Prevalence and genotype distribution of viral hepatitis B in Cambodia between 1990 and 2020: a systematic review and meta-analysis by Bunthen E, Pichetra Ou, Serge Ouoba, Md Razeen Ashraf Hussain, Ko Ko, Shintaro Nagashima, Aya Sugiyama, Tomoyuki Akita, Junko Tanaka

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The impact of COVID-19 on hepatitis B and C virus prevention, diagnosis, and treatment in Bangladesh compared with Japan and the global perspective by Md Razeen Ashraf Hussain, Mohammad Ali, Aya Sugiyama, Lindsey Hiebert, M. Anisur Rahman, Golam Azam, Serge Ouoba, Bunthen E, Ko Ko, Tomoyuki Akita, John W. Ward, Junko Tanaka

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Despite low viral titer in saliva samples, Sanger-based SARS-CoV-2 spike gene sequencing is highly applicable for the variant identification by Ko Ko, Kazuaki Takahashi, Noriaki Ito, Aya Sugiyama, Shintaro Nagashima, Kei Miwata, Yoshihiro Kitahara, Mafumi Okimoto, Serge Ouoba, Golda Ataa Akuffo, Bunthen E, Tomoyuki Akita, Toshiro Takafuta, Junko Tanaka

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A longitudinal study of anti-SARS-CoV-2 antibody seroprevalence in a random sample of the general population in Hiroshima in 2020 by Aya Sugiyama, Fumie Okada, Kanon Abe, Hirohito Imada, Serge Ouoba, Bunthen E, Md Razeen Ashraf Hussain, Masayuki Ohisa, Ko Ko, Shintaro Nagashima, Tomoyuki Akita, Shinichi Yamazaki, Michiya Yokozaki, Eisaku Kishita, Junko Tanaka

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