Sujin Yum, Kwan Hong, Sangho Sohn, Jeehyun Kim, and Byung Chul Chun
Figure. Mean weekly positivity rates for 8 respiratory viruses, South Korea, 2010–2019 compared with 2020. Vertical yellow line indicates the week of the first COVID-19 case in South Korea (i.e., the 5th week of 2020). Red line indicates weekly viral positivity rate in 2020. Blue bars show reported COVID-19 cases (Korean Ministry of Health and Welfare, http://ncov.mohw.go.kr/en). Dashed line indicates mean weekly positivity rates during 2010–2019 (data smoothed using the Loess method); gray shading indicates 95% CI. A) Total. B) Adenovirus. C) Human bocavirus. D) Human coronavirus. E) Human metapneumovirus. F) Human rhinovirus. G) Influenza virus. H) Human parainfluenza virus. I) Respiratory syncytial virus. COVID-19, coronavirus disease.