Updated on 2025/06/14

写真a

 
WAGATSUMA Keita
 
Organization
Academic Assembly Institute of Medicine and Dentistry IGAKU KEIRETU Assistant Professor
Faculty of Medicine School of Medicine Assistant Professor
Graduate School of Medical and Dental Sciences Community Disease Control Infectious Disease Control and International Medicine Assistant Professor
Title
Assistant Professor
Contact information
メールアドレス
Homepage
https://www.med.niigata-u.ac.jp/pub/
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External link

Research Interests

  • 感染症疫学

  • 新型コロナウイルス

  • 大気汚染

  • 地球温暖化

  • エアロゾル

  • 感染症

  • 気候変動

  • 時系列解析

  • グローバルヘルス

  • プラネタリーヘルス

  • 生物統計学

  • 環境疫学

  • Epidemiology

  • Climate Change

  • Environment

  • International Health

  • 国際保健

  • Virology

  • 手足口病

  • RSウイルス

  • インフルエンザ

  • 季節性

  • Seasonality

Research Areas

  • Life Science / Virology

  • Environmental Science/Agriculture Science / Environmental policy and social systems

  • Life Science / Hygiene and public health (non-laboratory)

  • Informatics / Statistical science

  • Natural Science / Applied mathematics and statistics

Research History (researchmap)

  • Niigata University   Assistant Professor

    2024.4

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  • Niigata University   Graduate School of Medical and Dental Sciences Course of Community Disease Control   Assistant Professor

    2024.4

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  • Niigata University   Faculty of Medicine School of Medicine   Assistant Professor

    2024.4

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  • Niigata University   Graduate School of Medical and Dental Sciences

    2022.4 - 2024.3

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  • Niigata University   Graduate School of Medical and Dental Sciences

    2021.4 - 2024.3

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  • Niigata University   Graduate School of Medical and Dental Sciences

    2021.4 - 2024.3

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  • Niigata University   Graduate School of Medical and Dental Sciences

    2019.4 - 2024.3

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  • Niigata University   Graduate School of Medical and Dental Sciences

    2019.4 - 2024.3

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Research History

  • Niigata University   Institute of Medicine and Dentistry, Academic Assembly   Assistant Professor

    2024.4

  • Niigata University   Infectious Disease Control and International Medicine, Community Disease Control, Graduate School of Medical and Dental Sciences   Assistant Professor

    2024.4

  • Niigata University   School of Medicine, Faculty of Medicine   Assistant Professor

    2024.4

Education

  • Niigata University   Graduate School of Medical and Dental Sciences   Course of Community Disease Control

    2021.4 - 2024.3

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  • Niigata University   Graduate School of Medical and Dental Sciences   Course of Medical Science

    2019.4 - 2021.3

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Professional Memberships

  • 日本数理生物学会

    2022.12

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  • 日本ウイルス学会

    2019.4

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  • 日本臨床ウイルス学会

    2019.4

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  • ISIRV（国際インフルエンザ・呼吸器ウイルス学会）

    2019.4

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  • 日本感染症学会

    2019.4

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  • 日本熱帯医学会

    2019.4

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  • 日本国際保健医療学会

    2019.4

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Committee Memberships

  • Virology Journal   Trusted Reviewer  

    2025.4   

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  • Sigma Xi （米国科学研究名誉協会）   正会員  

    2024.9   

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  • Frontiers in Public Health   Review Editor  

    2024.4   

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  • ウイルス学若手ネットワーク   世話人  

    2023.4 - 2024.3   

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Papers

  • Effects of high summer temperatures on heatstroke-related ambulance dispatches in Japan: A nationwide time-stratified case-crossover analysis

    Keita Wagatsuma

    Preventive medicine reports   2025.6

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  • Molecular epidemiological surveillance of respiratory syncytial virus infection in Myanmar from 2019 to 2023. International journal

    Jiaming Li, Irina Chon, Wint Wint Phyu, Yadanar Kyaw, Moe Myat Aye, Swe Setk, Su Mon Kyaw Win, Sayaka Yoshioka, Keita Wagatsuma, Yuyang Sun, Tri Bayu Purnama, Teruhime Otoguro, Tsutomu Tamura, Htay Htay Tin, Hisami Watanabe, Reiko Saito

    Scientific reports   15 ( 1 )   13126 - 13126   2025.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    To evaluate genetic changes in respiratory syncytial virus (RSV) between 2019 and 2023, we analyzed RSV strains from Myanmar before and after the COVID- 19 pandemic. Real-time polymerase chain reaction (RT-PCR) positive samples from children presenting with acute respiratory infections at outpatient clinics in Yangon were sequenced to determine the genotype. Phylogenetic and molecular evolutionary analyses were conducted using the Bayesian Markov Chain Monte Carlo method to construct the time-scale Maximum Clade Credibility tree. Of 1127 samples, 104 (9.2%) RSV-A and 233 (20.7%) RSV-B were positive by RT-PCR. There was an absence of a notable epidemic in 2020, a temporal shift with a surge of RSV-A in the 2021 outbreak, a lack of expected cases in 2022 and a substantial resurgence of RSV-B in 2023. The genotype of RSV-A was mainly A.D.3 lineage through the study period, while RSV-B were B.D.4.1.1 and B.D.E.1. RSV-A showed that the same lineage persisted within Myanmar throughout the pandemic, leading to a large outbreak post-COVID. In contrast, RSV-B strains appear to have temporarily disappeared during the pandemic, but subsequently, globally circulating strains likely entered Myanmar, resulting in a major outbreak in 2023. The estimated evolutionary rate at the G-ectodomain for RSV-A was 7.76 × 10⁻³ and RSV-B was 5.67 × 10⁻³ substitutions/site/year. Strengthening genomic surveillance will likely support comparisons of circulating strains with those in other countries and facilitate the introduction of vaccines and other interventions.

    DOI： 10.1038/s41598-025-97103-2

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  • Datasets for quantifying association between short-term exposure to maximum temperature and heatstroke-related ambulance dispatches in Japan: A time-stratified case-crossover design. International journal

    Keita Wagatsuma

    Data in brief   59   111307 - 111307   2025.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    This study provides a comprehensive collection of open-access daily time-series datasets designed to quantify the association between short-term exposure to maximum temperature and heatstroke-related ambulance dispatches (HSAD) utilizing a two-stage time-stratified case-crossover design. The datasets include daily records of HSAD, maximum temperature (°C), and relative humidity (%) for the summer months (i.e., June to September) from 2015 to 2019, spanning all 47 Japanese prefectures and covering the entire country. These datasets are well-suited for time-series regression analyses to estimate location-specific maximum temperature-HSAD associations in Japan. The availability of data from multiple locations also facilitates the of regional differences by aggregating location-specific associations within broader geographical areas. This resource is intended to support researchers, educators, and students in leveraging time-series analysis for research and educational purposes.

    DOI： 10.1016/j.dib.2025.111307

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  • Association between meteorological factors and varicella incidence in Japan: a nationwide time-series study. International journal

    Keita Wagatsuma

    International journal of biometeorology   69 ( 4 )   909 - 912   2025.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    Varicella, commonly referred to as chickenpox, is an airborne infectious disease that continues to pose an increasing threat to public health. Despite previous investigations, the global accumulation of epidemiological studies exploring the association between varicella epidemics and meteorological factors remains insufficient. This study aimed to quantify the short-term effect of meteorological factors, such as mean temperature and relative humidity, on the incidence of varicella across all 47 prefectures of Japan over a decade (2010-2019). Using a two-stage time-series modelling design, we first applied distributed lag non-linear models to estimate the exposure-response relationships for each prefecture, followed by a meta-regression to pool these results for a nationwide estimate. The analysis covered 1,315,616 varicella cases. Our findings indicate a significant increase in varicella risk associated with lower temperatures and reduced humidity. Specifically, the cumulative relative risk (RR) at the 5th temperature percentile, compared to the 99th, was 2.45 (95% confidence interval [CI]: 2.15, 2.79). The cumulative RR at the 5th humidity percentile, compared to the 90th, was 1.11 (95% CI: 1.03, 1.09). These results suggest that public health strategies targeting temperature- and humidity-related varicella morbidity could be more effective if adapted to local climatic conditions. Understanding the influence of meteorological factors on varicella transmission may further elucidate the mechanisms driving the disease's seasonal trends.

    DOI： 10.1007/s00484-025-02861-3

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  • Geographical variation in community-acquired pneumonia prevalence during the COVID-19 pandemic in Northern Sumatra, Indonesia

    Tri Bayu Purnama, Keita Wagatsuma, Masdalina Pane, Reiko Saito

    Discover public health   2025.4

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  • Short-term effects of meteorological factors on the incidence of mumps: A nationwide time-series analysis in Japan. International journal

    Keita Wagatsuma

    Public health   240   48 - 51   2025.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    OBJECTIVES: Mumps (infectious parotitis) is an acute respiratory illness caused by the mumps virus in humans. While numerous studies have explored the impact of climate variability on mumps incidence in specific cities or regions, few have analyzed nationwide associations across multiple locations. This study aims to systematically assess the short-term effects of meteorological factors on mumps incidence across Japan over a 15-year period. STUDY DESIGN: Weekly time-series of mumps cases and meteorological factors in the period 2005-2019 were collated from the 47 Japanese prefectures. METHODS: A two-stage time-series design was employed. The exposure-response relationships between incidence of mumps, mean temperature, and relative humidity were quantified using a quasi-Poisson regression with a distributed lag non-linear model for each prefecture and the estimates from all the prefectures were then pooled using a multivariate mete-regression model to derive nationwide average associations. RESULTS: Between 2005 and 2019, 1,455,583 mumps cases were reported. Our results indicate that increased mean temperature and relative humidity are positively associated with increased mumps incidence in Japan. Specifically, using -1.3 °C as the reference temperature, the relative risk (RR) of mumps peaked at 19.4 °C, with an RR of 1.16 (95 % confidence interval [CI]: 1.08-1.24). For humidity, using 45.5 % as the reference, the RR peaked at 68.3 %, with an RR of 1.05 (95 % CI: 1.02-1.09). CONCLUSIONS: Our findings demonstrate the influence of heat and humidity on mumps incidence in Japan and underscore the need for preventive measures to mitigate the impact of climate variability on mumps transmission.

    DOI： 10.1016/j.puhe.2025.01.015

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  • Prevalence and risk factors of acute respiratory infection and diarrhea among children under 5 years old in low-middle wealth household, Indonesia. International journal

    Tri Bayu Purnama, Keita Wagatsuma, Reiko Saito

    Infectious diseases of poverty   14 ( 1 )   13 - 13   2025.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    BACKGROUND: Acute respiratory infection (ARI) and diarrhea remain critical public health concerns. In Indonesia, various interventions have been implemented to reduce the prevalence of ARIs and diarrhea among children in low- and middle-income households. Hence, the absence of detailed data on the prevalence of ARIs and diarrhea among children under five in low- and middle-income households in Indonesia restricts the formulation of targeted health interventions and policies. This study sought to evaluate the prevalence of ARI and diarrhea while examining modifiable risk factors related to malnutrition, sanitation, and social protection characteristics in Indonesia. METHODS: This study utilized a cross-sectional design based on data from the Nutrition Status Survey 2022 covering 514 districts/cities in Indonesia. It analyzed 289,631 children under five years out of 334,848 households with low and middle wealth indices. Multivariable binary logistic regression analysis was employed to calculate the risk associated with cases of ARI and diarrhea. RESULTS: The prevalence of ARI and diarrhea among low- and middle-wealth households were 5.7% and 6.0%, respectively, with infants under six months being the most vulnerable group to these infections, including malnutrition. The most significant risk factors for ARI and diarrhea are unclean cooking fuel [adjusted odds ratio (aOR) = 1.53, 95% CI 1.47-1.60] and shared toilet facilities (aOR = 1.45, 95% CI 1.38-1.51), with households using shared toilets having 1.45 times higher risk of diarrhea (aOR = 1.45, 95% CI 1.38-1.51) compared to those with private access. Additionally, households lacking social protection support are also at increased risk for these infections and malnutrition issues. CONCLUSIONS: This study revealed a notable prevalence of ARI and diarrhea among low- and middle-wealth households, particularly affecting infants under six months. Vulnerable children, especially those who were stunted or underweight, and households lacking sanitation and social protection faced heightened risks for these health issues.

    DOI： 10.1186/s40249-025-01286-9

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  • Implications of President Trump's Second Term Executive Orders on Global and Public Health. International journal

    Keita Wagatsuma

    International journal of public health   70   1608402 - 1608402   2025.2

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    DOI： 10.3389/ijph.2025.1608402

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  • Future Projections of Temperature-Related Excess Morbidity Due to Influenza Under Climate Change Scenarios: A Case Study in a Temperate Japanese City

    Keita Wagatsuma

    Biomedical and environmental sciences   2025.2

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  • Antibody Responses to mRNA COVID-19 Vaccine Among Healthcare Workers in Outpatient Clinics in Japan. International journal

    Teruhime Otoguro, Keita Wagatsuma, Toshiharu Hino, The Society Of Ambulatory And General Pediatrics Of Japan, Yusuke Ichikawa, Tri Bayu Purnama, Yuyang Sun, Jiaming Li, Irina Chon, Hisami Watanabe, Reiko Saito

    Vaccines   13 ( 1 )   2025.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    BACKGROUND: This study aimed to assess the antibody response to SARS-CoV-2 vaccines among healthcare workers (HCWs) from multiple outpatient clinics in Japan, examining the effects of baseline characteristics (e.g., sex, age, underlying condition, smoking history, occupation) and prior infections. METHODS: A total of 101 HCWs provided serum at four time points between October 2020 and July 2023. HCWs received two to six doses of mRNA vaccine (BNT162b2 or mRNA-1273). Anti-nucleocapsid (N) and anti-spike (S) IgG antibodies against the ancestral Wuhan strain were measured using the Abbott Architect™ SARS-CoV-2 IgG assay. Univariate and regression analysis evaluated factors such as past infections, age, sex, smoking, underlying condition, and occupation. RESULTS: After four to six doses, the median anti-S IgG titer in uninfected HCWs was 1807.30 BAU/mL, compared to 1899.89 BAU/mL in HCWs with prior infections. The median anti-N IgG titer was 0.10 index S/C in uninfected HCWs and 0.39 index S/C in infected HCWs. HCWs with prior infection had anti-S IgG titers 1.1 to 5.8 times higher than those without. Univariate and multivariate analyses indicated infection and vaccination significantly increased anti-S and anti-N IgG titers. Age, sex, smoking history and occupation did not influence antibody titers while underlying conditions were associated with lower anti-N IgG titers. CONCLUSIONS: Infection and vaccination were strongly associated with an increase in anti-S and anti-N IgG titers; however, the impact of hybrid immunity appeared to be limited and varied depending on the timing of the sampling. These findings provide valuable insights for developing personalized vaccination strategies and future vaccine development.

    DOI： 10.3390/vaccines13010090

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  • Epidemiological and Clinical Characteristics of Mpox in Jakarta, Indonesia During October 2023 to February 2024. International journal

    Tri Bayu Purnama, Keita Wagatsuma, Supriadi Supriadi, Qonita Nur Salamah, Julian W Tang, Reiko Saito

    Disaster medicine and public health preparedness   18   e333 - e333   2025.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Cambridge University Press (CUP)  

    DOI： 10.1017/dmp.2024.329

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  • Letter to the editor: "Exposure to low humidex increases the risk of hip fracture admissions in a subtropical coastal Chinese city". International journal

    Keita Wagatsuma

    Bone   190   117311 - 117311   2025.1

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    Language：English   Publisher：Elsevier BV  

    DOI： 10.1016/j.bone.2024.117311

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  • Characterizing the seasonal influenza disease burden attributable to climate variability: A nationwide time-series modelling study in Japan, 2000-2019. International journal

    Keita Wagatsuma, Lina Madaniyazi, Chris Fook Sheng Ng, Reiko Saito, Masahiro Hashizume

    Environmental research   263 ( Pt 1 )   120065 - 120065   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.envres.2024.120065

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  • Climate change and expansion of vector-borne diseases in Japan: A public health challenge. International journal

    Keita Wagatsuma

    New microbes and new infections   62   101462 - 101462   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.nmni.2024.101462

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  • Morbidity Risk of Infectious Gastroenteritis Attributable to Cold and Heat Temperatures: An Analysis of National Surveillance Data in Japan (2000-2019). International journal

    Keita Wagatsuma

    Cureus   16 ( 12 )   e76367 - e76367   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    Introduction Climate change is a decisive factor affecting human health. While many epidemiological studies have investigated the acute impacts of ambient temperature on mortality and morbidity, the global burden of infectious gastroenteritis linked to temperature changes remains largely unexplored. Therefore, we aimed to examine the exposure-response associations between ambient temperature and infectious gastroenteritis incidence throughout Japan and quantify the temperature-related morbidity burden. Methods Weekly time-series data from 2000 to 2019, encompassing meteorological factors and infectious gastroenteritis cases, were collected from all 47 Japanese prefectures. A two-stage time-series design was employed. In the first stage, quasi-Poisson regression models combined with distributed lag non-linear models were used for each prefecture. In the second stage, a multivariate meta-analysis was conducted to derive national estimates. The attributable fractions were determined for both low and high temperatures, categorized as temperatures below or above the minimum risk temperature, respectively. Results The analysis included 19,571,939 infectious gastroenteritis cases. The exposure-response association between temperature and infectious gastroenteritis cases was non-linear, exhibiting an approximate M-shaped relationship. Overall, 51.7% (95% empirical confidence interval (eCI): 42.6, 58.4) of infectious gastroenteritis cases were attributable to non-optimal temperatures in Japan. The attributable fraction to low temperatures was 47.6% (95% eCI: 38.5, 54.2), whereas that of high temperatures was 4.1% (95% eCI: 2.4, 5.5). Conclusion The majority of the temperature-related infectious gastroenteritis burden in Japan was attributable to lower temperatures. Our findings indicate that public health strategies aimed at mitigating the burden of infectious gastroenteritis should take temperature levels into account.

    DOI： 10.7759/cureus.76367

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  • Pakistan's first MERS-CoV case: A wake up call for global health authorities. International journal

    Keita Wagatsuma

    New microbes and new infections   62   101516 - 101516   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.nmni.2024.101516

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  • Effect of short-term ambient temperature exposure on influenza A and B incidence: a time-series analysis of daily surveillance data in Kawasaki City, Japan. International journal

    Keita Wagatsuma

    IJID regions   13   100479 - 100479   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.ijregi.2024.100479

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  • 新潟市における新型コロナウイルス感染症のゲノム疫学並びに高齢者施設における血清疫学調査

    我妻 奎太

    新潟市医師会報   642   2 - 14   2024.9

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  • Association of ambient temperature with tuberculosis incidence in Japan: An ecological study. International journal

    Keita Wagatsuma

    IJID regions   12   100384 - 100384   2024.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijregi.2024.100384

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  • Effect of meteorological factors on the incidence of Mycoplasma pneumoniae pneumonia in Japan: a time series analysis. International journal

    Keita Wagatsuma

    International journal of biometeorology   68 ( 9 )   1903 - 1907   2024.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s00484-024-02712-7

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  • Detection of influenza A(H3N2) viruses with polymerase acidic subunit substitutions after and prior to baloxavir marboxil treatment during the 2022-2023 influenza season in Japan. International journal

    Irina Chon, Keita Wagatsuma, Reiko Saito, Julian W Tang, Sato Isamu, Eitaro Suzuki, Yutaka Shirahige, Takashi Kawashima, Michiyoshi Minato, Naoki Kodo, Hironori Masaki, Hirotsune Hamabata, Sayaka Yoshioka, Yusuke Ichikawa, Yuyang Sun, Jiaming Li, Teruhime Otoguto, Hisami Watanabe

    Antiviral research   229   105956 - 105956   2024.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.antiviral.2024.105956

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  • Effects of the Local Environment and Nutritional Status on the Incidence of Acute Respiratory Infections Among Children Under 5 Years Old in Indonesia. International journal

    Tri Bayu Purnama, Keita Wagatsuma, Masdalina Pane, Reiko Saito

    Journal of preventive medicine and public health = Yebang Uihakhoe chi   57 ( 5 )   461 - 470   2024.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3961/jpmph.24.246

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  • Whole-Genome Analysis of the Influenza A(H1N1)pdm09 Viruses Isolated from Influenza-like Illness Outpatients in Myanmar and Community-Acquired Oseltamivir-Resistant Strains Present from 2015 to 2019. International journal

    Irina Chon, Su Mon Kyaw Win, Wint Wint Phyu, Reiko Saito, Yadanar Kyaw, Nay Chi Win, Di Ja Lasham, Htay Htay Tin, Tsutomu Tamura, Teruhime Otoguro, Keita Wagatsuma, Yuyang Sun, Jiaming Li, Hisami Watanabe

    Viruses   16 ( 8 )   1300 - 1300   2024.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

    DOI： 10.3390/v16081300

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  • Duration of fever in children infected with influenza A(H1N1)pdm09, A(H3N2) or B virus and treated with baloxavir marboxil, oseltamivir, laninamivir, or zanamivir in Japan during the 2012-2013 and 2019-2020 influenza seasons. International journal

    Yuyang Sun, Keita Wagatsuma, Reiko Saito, Isamu Sato, Takashi Kawashima, Tadashi Saito, Yashushi Shimada, Yasuhiko Ono, Fujio Kakuya, Michiyoshi Minato, Naoki Kodo, Eitaro Suzuki, Akito Kitano, Irina Chon, Wint Wint Phyu, Jiaming Li, Hisami Watanabe

    Antiviral research   228   105938 - 105938   2024.8

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    DOI： 10.1016/j.antiviral.2024.105938

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  • クリニカルトピックス 気候変動と公衆衛生対策が駆動する呼吸器感染症の流行伝播

    我妻 奎太

    BIO Clinica   39 ( 6 )   493 - 498   2024.6

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    Language：Japanese   Publisher：(株)北隆館  

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  • Anti-SARS-CoV-2 IgG antibody after the second and third mRNA vaccinations in staff and residents in a nursing home with a previous COVID-19 outbreak in Niigata, Japan. International journal

    Keita Wagatsuma, Reiko Saito, Sayaka Yoshioka, Satoru Yamazaki, Ryosuke Sato, Masako Iwaya, Yoshiki Takahashi, Irina Chon, Makoto Naito, Hisami Watanabe

    Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy   30 ( 2 )   164 - 168   2024.2

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    DOI： 10.1016/j.jiac.2023.09.021

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  • Changing Seasonality of Influenza in the Post-COVID Era in Japan.

    Keita Wagatsuma, Teruhime Otoguro

    JMA journal   7 ( 1 )   138 - 139   2024.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.31662/jmaj.2023-0150

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  • COVID-19流行下における呼吸器感染症の流行ダイナミクス変化

    乙黒 光姫, 我妻 奎太

    国際保健医療   39 ( 1 )   15 - 17   2024

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    Language：Japanese   Publisher：(一社)日本国際保健医療学会  

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  • Molecular Epidemiology of Respiratory Syncytial Virus during 2019-2022 and Surviving Genotypes after the COVID-19 Pandemic in Japan. International journal

    Sayaka Yoshioka, Wint Wint Phyu, Keita Wagatsuma, Takao Nagai, Yasuko Sano, Kiyosu Taniguchi, Nobuo Nagata, Kazuhiko Tomimoto, Isamu Sato, Harumi Kaji, Ken Sugata, Katsumi Sugiura, Naruo Saito, Satoshi Aoki, Eitaro Suzuki, Yasushi Shimada, Hirotsune Hamabata, Irina Chon, Teruhime Otoguro, Hisami Watanabe, Reiko Saito

    Viruses   15 ( 12 )   2023.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v15122382

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  • Association of Ambient Temperature and Absolute Humidity with the Effective Reproduction Number of COVID-19 in Japan. International journal

    Keita Wagatsuma

    Pathogens (Basel, Switzerland)   12 ( 11 )   2023.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/pathogens12111307

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  • Nonlinear and Multidelayed Effects of Meteorological Drivers on Human Respiratory Syncytial Virus Infection in Japan. International journal

    Keita Wagatsuma, Iain S Koolhof, Reiko Saito

    Viruses   15 ( 9 )   2023.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v15091914

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  • Factors associated with viral RNA shedding and evaluation of potential viral infectivity at returning to school in influenza outpatients after treatment with baloxavir marboxil and neuraminidase inhibitors during 2013/2014-2019/2020 seasons in Japan: an observational study. International journal

    Jiaming Li, Keita Wagatsuma, Yuyang Sun, Isamu Sato, Takashi Kawashima, Tadashi Saito, Yasushi Shimada, Yasuhiko Ono, Fujio Kakuya, Nobuo Nagata, Michiyoshi Minato, Naoki Kodo, Eitaro Suzuki, Akito Kitano, Toshihiro Tanaka, Satoshi Aoki, Irina Chon, Wint Wint Phyu, Hisami Watanabe, Reiko Saito

    BMC infectious diseases   23 ( 1 )   188 - 188   2023.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1186/s12879-023-08140-z

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  • Whole-Genome Analysis of Influenza A(H3N2) and B/Victoria Viruses Detected in Myanmar during the COVID-19 Pandemic in 2021. International journal

    Irina Chon, Reiko Saito, Yadanar Kyaw, Moe Myat Aye, Swe Setk, Wint Wint Phyu, Keita Wagatsuma, Jiaming Li, Yuyang Sun, Teruhime Otoguro, Su Mon Kyaw Win, Sayaka Yoshioka, Nay Chi Win, Lasham Di Ja, Htay Htay Tin, Hisami Watanabe

    Viruses   15 ( 2 )   2023.2

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    DOI： 10.3390/v15020583

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  • Assessing the Pre-Vaccination Anti-SARS-CoV-2 IgG Seroprevalence among Residents and Staff in Nursing Home in Niigata, Japan, November 2020. International journal

    Keita Wagatsuma, Sayaka Yoshioka, Satoru Yamazaki, Ryosuke Sato, Wint Wint Phyu, Irina Chon, Yoshiki Takahashi, Hisami Watanabe, Reiko Saito

    Viruses   14 ( 11 )   2022.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v14112581

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  • Evolutionary Dynamics of Whole-Genome Influenza A/H3N2 Viruses Isolated in Myanmar from 2015 to 2019. International journal

    Wint Wint Phyu, Reiko Saito, Yadanar Kyaw, Nay Lin, Su Mon Kyaw Win, Nay Chi Win, Lasham Di Ja, Khin Thu Zar Htwe, Thin Zar Aung, Htay Htay Tin, Eh Htoo Pe, Irina Chon, Keita Wagatsuma, Hisami Watanabe

    Viruses   14 ( 11 )   2022.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v14112414

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  • The Relative Roles of Ambient Temperature and Mobility Patterns in Shaping the Transmission Heterogeneity of SARS-CoV-2 in Japan. International journal

    Keita Wagatsuma, Iain S Koolhof, Reiko Saito

    Viruses   14 ( 10 )   2022.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v14102232

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  • Was the Reduction in Seasonal Influenza Transmission during 2020 Attributable to Non-Pharmaceutical Interventions to Contain Coronavirus Disease 2019 (COVID-19) in Japan? International journal

    Keita Wagatsuma, Iain S Koolhof, Reiko Saito

    Viruses   14 ( 7 )   2022.6

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v14071417

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  • Duration of fever and symptoms in influenza-infected children treated with baloxavir marboxil during the 2019-2020 season in Japan and detection of influenza virus with the PA E23K substitution. International journal

    Keita Wagatsuma, Reiko Saito, Irina Chon, Wint Wint Phyu, Kakuya Fujio, Takashi Kawashima, Isamu Sato, Tadashi Saito, Michiyoshi Minato, Naoki Kodo, Eitaro Suzuki, Yasuhiko Ono, Hironori Masaki, Yutaka Shirahige, Akito Kitano, Hirotsune Hamabata, Sun Yuyang, Li Jiaming, Hisami Watanabe

    Antiviral research   201   105310 - 105310   2022.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.antiviral.2022.105310

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  • Epidemiology and Genetic Analysis of SARS-CoV-2 in Myanmar during the Community Outbreaks in 2020. International journal

    Wint Wint Phyu, Reiko Saito, Keita Wagatsuma, Takashi Abe, Htay Htay Tin, Eh Htoo Pe, Su Mon Kyaw Win, Nay Chi Win, Lasham Di Ja, Sekizuka Tsuyoshi, Kuroda Makoto, Yadanar Kyaw, Irina Chon, Shinji Watanabe, Hideki Hasegawa, Hisami Watanabe

    Viruses   14 ( 2 )   2022.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/v14020259

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  • 二次データを利用したCOVID-19流行下におけるグローバルヘルス研究の可能性

    我妻 奎太

    国際保健医療   37 ( 4 )   231 - 233   2022

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  • Evolutionary analysis of human respiratory syncytial virus collected in Myanmar between 2015 and 2018. International journal

    Wint Wint Phyu, Khin Thu Zar Htwe, Reiko Saito, Yadanar Kyaw, Nay Lin, Clyde Dapat, Hidekazu Osada, Irina Chon, Su Mon Kyaw Win, Akinobu Hibino, Keita Wagatsuma, Latt Latt Kyaw, Htay Htay Tin, Hisami Watanabe

    Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases   93   104927 - 104927   2021.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.meegid.2021.104927

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  • Decreased human respiratory syncytial virus activity during the COVID-19 pandemic in Japan: an ecological time-series analysis. International journal

    Keita Wagatsuma, Iain S Koolhof, Yugo Shobugawa, Reiko Saito

    BMC infectious diseases   21 ( 1 )   734 - 734   2021.8

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1186/s12879-021-06461-5

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  • Development of cycling probe based real-time PCR methodology for influenza A viruses possessing the PA/I38T amino acid substitution associated with reduced baloxavir susceptibility. International journal

    Hidekazu Osada, Irina Chon, Wint Wint Phyu, Keita Wagatsuma, Nobuo Nagata, Takashi Kawashima, Isamu Sato, Tadashi Saito, Naoki Kodo, Hironori Masaki, Norichika Asoh, Yoshiko Tsuchihashi, Yutaka Shirahige, Yasuhiko Ono, Yasushi Shimada, Hirotsune Hamabata, Kousuke Saito, Reiko Saito

    Antiviral research   188   105036 - 105036   2021.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.antiviral.2021.105036

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  • Geographic Correlation between the Number of COVID-19 Cases and the Number of Overseas Travelers in Japan, Jan-Feb, 2020.

    Keita Wagatsuma, Wint Wint Phyu, Hidekazu Osada, Julian W Tang, Reiko Saito

    Japanese journal of infectious diseases   74 ( 2 )   157 - 160   2021.3

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    DOI： 10.7883/yoken.JJID.2020.471

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  • Shifts in the epidemic season of human respiratory syncytial virus associated with inbound overseas travelers and meteorological conditions in Japan, 2014-2017: An ecological study. International journal

    Keita Wagatsuma, Iain S Koolhof, Yugo Shobugawa, Reiko Saito

    PloS one   16 ( 3 )   e0248932   2021

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  • Genomic Epidemiology Reveals Multiple Introductions of Severe Acute Respiratory Syndrome Coronavirus 2 in Niigata City, Japan, Between February and May 2020. International journal

    Keita Wagatsuma, Ryosuke Sato, Satoru Yamazaki, Masako Iwaya, Yoshiki Takahashi, Akiko Nojima, Mitsuru Oseki, Takashi Abe, Wint Wint Phyu, Tsutomu Tamura, Tsuyoshi Sekizuka, Makoto Kuroda, Haruki H Matsumoto, Reiko Saito

    Frontiers in microbiology   12   749149 - 749149   2021

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    DOI： 10.3389/fmicb.2021.749149

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  • Duration of fever and symptoms in children after treatment with baloxavir marboxil and oseltamivir during the 2018-2019 season and detection of variant influenza a viruses with polymerase acidic subunit substitutions. International journal

    Reiko Saito, Hidekazu Osada, Keita Wagatsuma, Irina Chon, Isamu Sato, Takashi Kawashima, Tadashi Saito, Naoki Kodo, Yasuhiko Ono, Yasushi Shimada, WintWint Phyu, Yugo Shobugawa

    Antiviral research   183   104951 - 104951   2020.11

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    DOI： 10.1016/j.antiviral.2020.104951

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  • バロキサビル マルボキシルの有効性と問題点

    我妻 奎太, 長田 秀和, Irina Chon, 齋藤 玲子

    インフルエンザ   21 ( 2 )   75 - 79   2020.6

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  • 【東京2020:inbound/outbound感染症対策】わが国における季節外れのインフルエンザ流行とマスギャザリング

    我妻 奎太, 長田 秀和, Chon Irina, 浜端 宏英, 斎藤 玲子

    臨床とウイルス   47 ( 5 )   368 - 377   2019.12

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Presentations

  • Molecular epidemiological surveillance of respiratory syncytial virus infection in Myanmar from 2019 to 2023

    Jiaming Li, Reiko Saito, Irina Chon, Wint Wint Phyu, Sayaka Yoshioka, Keita Wagatsuma, Yuyang Sun, Teruhime Otoguro, Tsutomu Tamura, Hisami Watanabe

    第71回日本ウイルス学会学術集会  2024.11 

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  • How do we know that climate change impacts infectious diseases? Invited

    Keita Wagatsuma

    The 25th International Conference on Emerging Infectious Diseases (EID) in the Pacific Rim of the U.S.-Japan Cooperative Medical Sciences Program (USJCMSP).  2025.3 

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  • Epidemiology and Evolution of Human Respiratory Syncytial Virus Derived from Whole-Genome Sequencing in Japan, 2018–2024

    Yusuke Ichikawa, Tsutomu Tamura, Narumi Matsuno, Jiaming Li, Keita Wagatsuma, Tri Bayu Purnama, Hisami Watanabe, Reiko Saito

    The 25th International Conference on Emerging Infectious Diseases (EID) in the Pacific Rim of the U.S.-Japan Cooperative Medical Sciences Program (USJCMSP).  2025.3 

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  • Climate Change, Transmission Dynamics of Infectious Diseases, & Human Health in LMICs Invited

    Keita Wagatsuma

    GHIT R&D Forum 2024  2024.12 

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  • Comprehensive surveillance of respiratory infections in Myanmar in 2023

    Yuyang Sun, Tsutomu Tamura, Teruhime Otoguro, Irina Chon, Keita Wagatsuma, Jiaming Li, Nanjun Li, Hisami Watanabe, Reiko Saito

    第71回日本ウイルス学会学術集会  2024.11 

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  • 気候変動に起因する手足口病の流行伝播の時空間変動評価

    我妻 奎太

    第71回日本ウイルス学会学術集会  2024.11 

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  • Influenza A(H1N1)pdm09, A(H3N2), B/Victoria Characteristics and PA Variant Frequencies Pre- and Post-Baloxavir Treatment in 2023-2024 Season

    Nanjun Li, Irina Chon, Yuyang Sun, Jiaming Li, Sayaka Yoshioka, Teruhime Otoguro, Yusuke Ichikawa, Keita Wagatsuma, Tsutomu Tamura, Hisami Watanabe, Reiko Saito

    第71回日本ウイルス学会学術集会  2024.11 

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  • 2022-2023 年にミャンマーで採取されたSARS-CoV-2の全ゲノム解析

    乙黒 光姫, 阿部 貴志, Kyaw Yadanar, Win Kyaw Su Mo, Irina Chon, 吉岡 沙耶加, Aye Myat Moe, Tin Htay Htay, 市川 雄介, 我妻 奎太, 孫 宇陽, 李 佳銘, 田村 務, 渡部 久実, 齋藤 玲子

    第71回日本ウイルス学会学術集会  2024.11 

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  • 気候変動に起因する手足口病の疾病負荷の定量化

    我妻 奎太

    第28回日本ワクチン学会・第65回日本臨床ウイルス学会 合同学術集会  2024.10 

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  • 気候変動に起因する手足口病の疾病負荷の評価

    我妻奎太

    第73回日本感染症学会東日本地方会学術集会・第71回日本化学療法学会東日本支部総会 合同学会  2024.10 

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  • Quantifying the burden of seasonal influenza morbidity attributable to climate variability: a nationwide time-series modelling study in Japan, 2000−19

    Keita Wagatsuma

    Options XII for the Control of Influenza  2024.9 

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  • 気候変動に起因するインフルエンザの疾病負担の定量化

    我妻奎太

    第42回びわ湖国際医療フォーラム  2024.7 

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  • Vulnerability of influenza morbidity attributable to climate variability: a nationwide time-series modelling study in Japan, 2000−2019

    Keita Wagatsuma

    The Joint 24th International Conference on Emerging Infectious Diseases in the Pacific Rim of the U.S.-Japan Cooperative Medical Sciences Program (USJCMSP) in collaboration with the 2nd International Symposium for Infectious Diseases Research Institutes Cooperation (IDRIC)  2024.3 

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  • RSウイルス感染症の流行が起きる気象条件

    我妻 奎太

    第27回日本ワクチン学会・第64回日本臨床ウイルス学会 合同学術集会  2023.10 

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  • 気候変動とRSウイルス感染症の伝播動態

    我妻 奎太

    第72回日本感染症学会東日本地方学術集会・第70回日本化学療法学会東日本支部総会 合同学会  2023.10 

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  • Disentangling the non-linear and multi-delayed effects of meteorological drivers on human respiratory syncytial virus infection in Japan

    Keita Wagatsuma

    第70回日本ウイルス学会学術集会  2023.9 

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  • Molecular epidemiological surveillance of respiratory syncytial virus infection in Myanmar from 2019 to 2022

    Jiaming Li, Reiko Saito, Irina Chon, Wint Wint Phyu, Sayaka Yoshioka, Keita Wagatsuma, Yuyang Sun, Teruhime Otoguro, Hisami Watanabe

    第70回日本ウイルス学会学術集会  2023.9 

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  • Detection of PA variants in influenza A/ H3N2 infected patients and the clinical course after baloxavir treatment during 2022-2023 season in Japan

    Irina Chon, Keita Wagatsuma, Reiko Saito, Sayaka Yoshioka, Isamu Sato, Yutaka Shirahige, Eitaro Suzuki, Takashi Kawashima, Michiyoshi Minato, Naoki Kodo, Hironori Masaki, Hirotsune Hamabata, Yuyang Sun, Jiaming Li, Teruhime Otoguto, Yusuke Ichikawa, Hisami Watanabe

    第70回日本ウイルス学会学術集会  2023.9 

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  • 気候変動と制御介入による新型コロナウイルスの季節性変化

    我妻 奎太

    第1回新型コロナウイルス研究集会  2023.6 

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  • Disentangling the role of ambient temperature and mobility patterns in driving SARS-CoV-2 transmission in Japan

    Keita Wagatsuma

    日本国際保健医療学会 第41回西日本地方会  2023.3 

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  • 日本におけるSARS-CoV-2伝播動態を駆動する気温とヒト移動パターンの統計的モデリング

    我妻奎太

    第8回数理生物学交流発表会  2023.3 

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  • 新潟市の高齢者介護施設におけるCOVID-19の血清疫学調査 Invited

    我妻奎太

    第11回新潟市医師会地域医療研究助成発表会  2023.1 

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  • 新型コロナウイルス感染症の伝搬動態を駆動する気候及び人移動の相対的役割

    我妻奎太

    ウイルス学若手研究集会2022  2022.11 

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  • Evolutionary dynamics of whole-genome Influenza A/H3N2 viruses isolated in Myanmar from 2015 to 2019

    Wint Wint Phyu, Reiko Saito, Yadanar Kyaw, Nay Lin, Su Mon Kyaw Win, Nay Chi Win, Lasham Di Ja, Khin Thu Zar Htwe, Thin Zar Aung, Htay Htay Tin, Eh Htoo Pe, Irina Chon, Keita Wagatsuma, Hisami Watanabe

    第69回日本ウイルス学会学術集会  2022.11 

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  • 日本における季節性インフルエンザの伝播減少は、COVID-19封じ込めを目的とした非医薬品的介入に起因したのか？

    我妻奎太, 齋藤玲子

    第69回日本ウイルス学会学術集会  2022.11 

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  • 新型コロナ流行下のRSウイルス感染症の分子疫学サーベイランス

    吉岡沙耶加, Wint Wint Phyu, Irina Chon, 我妻奎太, 孫宇陽, 李佳銘, 谷口清州, 杉浦勝美, 菅田健, 長田伸夫, 冨本和彦, 青木才一志, 西藤成雄, 鈴木英太郎, 永井崇雄, 浜端宏英, 島田康, 佐藤勇, 加地はるみ, 佐野康子, 渡部久実, 齋藤玲子

    第69回日本ウイルス学会学術集会  2022.11 

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  • 季節性インフルエンザの減少は、新型コロナ流行下の公衆衛生的介入と関連していた

    我妻奎太

    第40回びわ湖国際フォーラム  2022.7 

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  • 季節性インフルエンザの減少は、新型コロナ流行下の公衆衛生的介入と関連している

    我妻奎太

    第35回インフルエンザ研究者交流会  2022.7 

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  • Decreased Seasonal Influenza Activity during the COVID-19 Pandemic in Japan: A Time-Series Ecological Modelling Study

    Keita Wagatsuma

    Ecology and Evolution of Infectious Diseases 2022  2022.6 

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  • Characterizing behavioral and environmental associations with transmission patterns of COVID-19 infections in Japan, April–June 2020

    Keita Wagatsuma

    日本国際保健医療学会 第36回東日本地方会  2022.5 

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  • 本邦における新型コロナ流行時の非医薬品的介入に起因する季節性インフルエンザ伝播抑制の特定: 生態学的モデリング研究

    我妻奎太

    日本国際保健医療学会 第40回西日本地方会  2022.3 

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  • 新潟市における新型コロナウイルス感染症（COVID-19）の疫学研究 Invited

    我妻奎太

    第10回新潟市医師会地域医療研究助成発表会  2022.1 

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  • 抗インフルエンザ剤治療後のウイルスRNA量変化

    李佳銘, 我妻奎太, 孫宇陽, 佐藤勇, 川島崇, 斉藤匡, 島田康, 小野靖彦, 角谷不二雄, 長田伸夫, 湊道嘉, 幸道直樹, 鈴木英太郎, 北野昭人, 渡部久実, 齋藤玲子

    第70回日本感染症学会東日本地方会学術集会・第68回日本化学療法学会東日本支部総会 合同学会  2021.10 

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  • Decreased Human Respiratory Syncytial Virus Activity during the COVID-19 Pandemic in Japan: An Ecological Time-Series Analysis, 2014 through 2020

    Keita Wagatsuma, Iain S. Koolhof, Reiko Saito

    IDWeek 2021  2021.10 

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  • 2012～2020年にわたる小児インフルエンザ治療効果

    孫宇陽, 我妻奎太, 李佳銘, 佐藤勇, 川島崇, 齊藤匡, 島田康, 小野靖彦, 角谷不二雄, 湊 通嘉, 幸道直樹, 鈴木英太郎, 北野昭人, Irina Chon, Wint Wint Phyu, 渡部久実, 齋藤玲子

    第28回みかんの会  2021.10 

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  • 2012～2020年にわたる小児インフルエンザ治療効果

    孫宇陽, 我妻奎太, 李佳銘, 佐藤勇, 川島崇, 齊藤匡, 島田康, 小野靖彦, 角谷不二雄, 湊 通嘉, 幸道直樹, 鈴木英太郎, 北野昭人, Irina Chon, Wint Wint Phyu, 渡部久実, 齋藤玲子

    第70回日本感染症学会東日本地方会学術集会・第68回日本化学療法学会東日本支部総会 合同学会  2021.10 

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  • 抗インフルエンザ剤治療後のウイルスRNA量変化

    李佳銘, 我妻奎太, 孫宇陽, 佐藤勇, 川島崇, 斉藤匡, 島田康, 小野靖彦, 角谷不二雄, 長田伸夫, 湊道嘉, 幸道直樹, 鈴木英太郎, 北野昭人, 渡部久実, 齋藤玲子

    第28回みかんの会  2021.10 

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  • 新潟市における新型コロナウイルス感染症流行初期の疫学的特徴とゲノム解析

    我妻奎太, 田村務, 黒田誠, 齋藤玲子

    第70回日本感染症学会東日本地方会学術集会・第68回日本化学療法学会東日本支部総会 合同学会  2021.10 

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  • 2012～2020年にわたる小児インフルエンザ治療効果

    孫宇陽, 我妻奎太, 李佳銘, 佐藤勇, 川島崇, 齊藤匡, 島田康, 小野靖彦, 角谷不二雄, 湊 通嘉, 幸道直樹, 鈴木英太郎, 北野昭人, Irina Chon, Wint Wint Phyu, 渡部久実, 齋藤玲子

    第34回インフルエンザ研究者交流の会  2021.7 

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  • RSウイルス感染症の減少は、新型コロナ流行下の公衆衛生的介入と関連している

    我妻奎太, 齋藤玲子

    第34回インフルエンザ研究者交流の会  2021.7 

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  • RSウイルス感染症の減少は、新型コロナ流行下の公衆衛生的介入と関連している

    我妻奎太

    第62回日本臨床ウイルス学会  2021.6 

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  • Shifts in the epidemic season of human respiratory syncytial virus associated with inbound overseas travelers and meteorological conditions in Japan.

    Keita Wagatsuma, Reiko Saito

    Ecology and Evolution of Infectious Diseases 2021  2021.6 

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  • 本邦におけるインバウンド海外渡航客と気象条件に関連したRSウイルス感染症の流行時期の変化

    我妻奎太

    第35回日本国際保健医療学会東日本地方会  2021.4 

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  • Decreased human respiratory syncytial virus activity during COVID-19 pandemic in Japan associated with non-pharmaceutical measurement compared to pre- pandemic period

    Keita Wagatsuma, Reiko Saito

    ISIRV RSV WEBINAR SERIES  2021.2 

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  • ミャンマーにおける新型コロナウイルス感染症の疫学的特徴

    我妻奎太

    データサイエンティスト育成シンポジウム  2021.1 

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  • 2020年1-2月の日本におけるCOVID-19症例数と海外渡航客数の地理的な相関

    我妻奎太

    ウイルス学若手研究集会2020  2020.12 

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  • 2020年1-2月の日本におけるCOVID-19症例数と海外渡航客数の地理的な相関

    我妻奎太, Wint Wint Phyu, 長田秀和, 齋藤玲子

    グローバルヘルス合同学会2020  2020.11 

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  • PA/I38Tアミノ酸置換を有するA型インフルエンザウイルスの迅速検出法と市中株頻度

    長田秀和, 我妻奎太, 齋藤玲子

    第61回日本臨床ウイルス学会  2020.10 

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  • 日本におけるCOVID-19症例数と海外渡航客数の地理的な相関: 2020年1-3月

    我妻奎太, Wint Wint Phyu, 長田秀和, 齋藤玲子

    第27回みかんの会  2020.10 

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  • 本邦で確認された新型コロナウイルス感染症（COVID-19）と外国人渡航客数との関連について

    我妻奎太

    第61回日本臨床ウイルス学会  2020.10 

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  • Geographic correlation between the number of COVID-19 cases and the number of overseas travelers in Japan, January-February 2020

    Keita Wagatsuma, Wint Wint Phyu, Hidekazu Osada, Julian W. Tang, Reiko Saito

    The special isirv-AVG virtual Conference, Therapeutics for COVID-19  2020.10 

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Awards

  • JA新潟厚生連基金

    2024.6   新潟大学  

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  • スタートアップ研究資金

    2024.4   新潟大学若手教員スイングバイ・プログラム  

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  • 博士課程奨学金

    2021.4   新潟大学  

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  • データサイエンティスト育成シンポジウム奨励賞

    2021.1   新潟大学  

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  • 若手医学研究賞

    2020.10   新潟大学  

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Research Projects

  • 世界的規模における新型コロナウイルス感染症の時空間変動評価と将来予測法の構築

    Grant number：25K20622

    2025.4 - 2028.3

    System name：科学研究費助成事業

    Research category：若手研究

    Awarding organization：日本学術振興会

    我妻 奎太

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    Grant amount：\4810000 （ Direct Cost: \3700000 、 Indirect Cost：\1110000 ）

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  • Development of a spatio-temporal fluctuation evaluation and epidemic prediction method with a view to suppressing and controlling respiratory infections

    Grant number：24K23680

    2024.7 - 2026.3

    System name：Grants-in-Aid for Scientific Research

    Research category：Grant-in-Aid for Research Activity Start-up

    Awarding organization：Japan Society for the Promotion of Science

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    Grant amount：\2860000 （ Direct Cost: \2200000 、 Indirect Cost：\660000 ）

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  • 数理モデルと機械学習を活用した呼吸器ウイルス感染症の流行予測法の開発

    2024.7 - 2025.3

    Research category：新潟大学U-goグラント

    我妻奎太

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    Authorship：Principal investigator 

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  • Disentangling transmission dynamics of SARS-CoV-2 and changes in epidemic dynamics of respiratory virus infections

    Grant number：22KJ1447

    2023.3 - 2025.3

    System name：Grants-in-Aid for Scientific Research

    Research category：Grant-in-Aid for JSPS Fellows

    Awarding organization：Japan Society for the Promotion of Science

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    Grant amount：\2500000 （ Direct Cost: \2500000 ）

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  • 新潟県のデータを用いた新型コロナワクチンの有効性の検証

    2022.9 - 2023.4

    Research category：新潟大学塚田医学奨学基金

    我妻奎太

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    Authorship：Principal investigator 

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  • 新潟市における新型コロナウイルス感染症（COVID-19）の疫学研究

    2021.4 - 2024.3

    Research category：新潟市医師会地域医療研究助成

    我妻奎太

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    Authorship：Principal investigator 

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  • 本邦における新型コロナウイルス感染症の都道府県別の患者推移の解析と地理的伝播状況のマッピング

    2020.7 - 2021.3

    Research category：新潟大学協和会医学研究助成

    我妻奎太

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    Authorship：Principal investigator 

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Other research activities

  • Epidemics - Certificate

    2021.11

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    The University of Hong Kong

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  • International Clinical Research (Trials) during COVID-19 era: "Should we suspend or continue?" - Certificate

    2021.3

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    National Center for Global Health and Medicine

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  • Global Health Policy - Certificate

    2020.11

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    The University of Tokyo

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  • COVID-19: GLOBAL HEALTH PERSPECTIVES - Certificate

    2020.8

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    THE UNIVERSITY OF MELBOURNE AND THE NOSSAL INSTITUTE FOR GLOBAL HEALTH

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  • COVID-19: TACKLING THE NOVEL CORONAVIRUS - Certificate

    2019.3

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    LONDON SCHOOL OF HYGIENE & TROPICAL MEDICINE AND UK PUBLIC HEALTH RAPID SUPPORTTEAM

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  • 中学校教諭一種教員免許状（数学）

    2019.3

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  • 高等学校教諭一種教員免許状（数学）

    2019.3

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  • 高等学校教諭一種教員免許状（情報）

    2019.3

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Teaching Experience (researchmap)

Teaching Experience

  • 公衆衛生学

    2024
    Institution name：新潟大学

 

Social Activities