Research field (2):
Virology
, Hygiene and public health (laboratory)
Research keywords (2):
ウイルスの分子疫学
, ウイルス感染症の病態
Research theme for competitive and other funds (9):
2022 - 2025 免疫抑制薬投与下におけるCOVID-19ワクチン接種の有効性と安全性
2021 - 2024 Detection of host risk factors of SARS CoV-2 infection in exosomes and other extracellular vesicles in saliva
2019 - 2024 Analysis of molecular evolution of various respiratory viruses in an area of the Philippines
2019 - 2023 Epidemiological study for control of respiratory syncytial virus from a global perspective
2017 - 2020 エンテロウイルスD68型の抗体保有状況の推移と流行の関連
2016 - 2019 Transmission dynamics of Respiratory Syncytial Virus and Establishing New Control Measures
2015 - 2019 Epidemiological study on influenza seasonality and an association with its dynamics in school children
2016 - 2018 Molecular Mechanisms a Novel Genotype of Respiratory Syncytial Virus Replaced Old One
2012 - 2016 Transmission dynamics and evolution of influenza viruses in Asia
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Papers (85):
Chuyao Yu, Maria Carmen A Corpuz, Joseph M Bonifacio, Makiko Kishi, Takeaki Imamura, Yusuke Sayama, Mariko Saito-Obata, Clyde Dapat, Michiko Okamoto, Hitoshi Oshitani, et al. Norovirus-associated diarrhea and asymptomatic infection in children aged under 4 years: a community-cohort study in the Philippines. IJID regions. 2025. 14. 100549-100549
Yusuke Sayama, Chuan Lo, Hiroki Tomizawa, Mayuko Saito, Michiko Okamoto, Suguru Ohmiya, Hidekazu Nishimura, Hitoshi Oshitani. Serological analyses against endemic human coronaviruses and SARS-CoV-2 in children and adults using samples collected before the COVID-19 pandemic. IJID regions. 2024. 13. 100485-100485
Paul Simusika, Michiko Okamoto, Clyde Dapat, Walter Muleya, Moffat Malisheni, Sikandar Azam, Takeaki Imamura, Mayuko Saito, Innocent Mwape, Evans Mpabalwani, et al. Characterization of human respiratory syncytial virus in children with severe acute respiratory infection before and during the COVID-19 pandemic. IJID regions. 2024. 11. 100354-100354
Yusuke Sayama, Akie Sakagami, Michiko Okamoto, Masahiro Sakamoto, Hikari Koizumi, Yoko Kimura, Clyde Dapat, Mayuko Saito, Yuko Suzuki, Mie Sasaki, et al. Identification of Various Recombinants in a Patient Coinfected With the Different SARS-CoV-2 Variants. Influenza and other respiratory viruses. 2024. 18. 6. e13340
Shiori Kitaya, Hiroaki Baba, Michiko Okamoto, Masahiro Sakamoto, Asami Nakayama, Yumiko Takei, Issei Seike, Kentarou Takei, Kengo Oshima, Koichi Tokuda, et al. Severe pneumonia due to Legionella and SARS-CoV-2 co-infection necessitating medical evacuation from a cargo ship. Journal of travel medicine. 2023. 30. 5