Pandemic Watch
Outbreak history on January 5
Historical outbreak-response milestones recorded on this calendar date, drawn from WHO Disease Outbreak News, CDC archives, and primary epidemiological literature.
- 2020COVID-19
WHO issues first DON on pneumonia of unknown cause in China
WHO published Disease Outbreak News on a cluster of pneumonia cases of unknown cause in Wuhan, China — the first international notification of what would become COVID-19. The bulletin reported 44 cases of severe pneumonia with no recognized etiologic agent, and noted that a seafood market in Wuhan was the suspected exposure setting.
Browse the full outbreak history calendar for milestones across all dates.
