Alliance for Pandemic Preparedness

July 31, 2020

Observations of the Global Epidemiology of COVID-19 from the Prepandemic Period Using Web-Based Surveillance: A Cross-Sectional Analysis

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  • Identifying cases of COVID-19 using official websites, press releases, press conference transcripts, and social media feeds of national ministries of health, Dawood et al. conclude that travelers to China, Italy, or Iran accounted for almost two-thirds of the first reported cases in 99 other countries. 
  • Although clusters of household transmission associated with these index cases were common, clusters in occupational or community settings tended to be larger. 

Dawood et al. (July 2020). Observations of the Global Epidemiology of COVID-19 from the Prepandemic Period Using Web-Based Surveillance: A Cross-Sectional Analysis. The Lancet Infectious Diseases. https://doi.org/10.1016/S1473-3099(20)30581-8