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. 2021 Nov 22;74(6):570-572.
doi: 10.7883/yoken.JJID.2020.1009. Epub 2021 Apr 30.

Number of Patients with Influenza and COVID-19 Coinfection in a Single Japanese Hospital during the First Wave

Shoko Kawai  1 , Kazuaki Fukushima  2 , Makiko Yomota  1 , Akito Fukuda  1 , Sho Fujiwara  2 , Masaru Tanaka  2 , Taiichiro Kobayashi  2 , Keishiro Yajima  2 , Yukio Hosomi  1 , Akifumi Imamura  2
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Free article

Number of Patients with Influenza and COVID-19 Coinfection in a Single Japanese Hospital during the First Wave

Shoko Kawai et al. Jpn J Infect Dis. .
Free article

Abstract

An individual may contract coronavirus disease 2019 (COVID-19) and influenza simultaneously; hence, adequate measures must be undertaken for the next winter in Japan. In preparation for the future, this study aimed to clarify the incidence of influenza coinfection in patients with COVID-19 during the previous winter. We conducted a retrospective study of the medical records of 193 patients diagnosed with COVID-19 between January 31, 2020, and April 23, 2020, in a single hospital. We evaluated the incidence of COVID-19 and influenza coinfection. Using rapid diagnostic testing, we found that no patient with COVID-19 was coinfected with influenza. Coinfection with influenza and COVID-19 was rare during the past winter in Japan.

Keywords: COVID-19; coinfection; coronavirus disease 2019; influenza; viral interference.

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