Alliance for Pandemic Preparedness

February 18, 2020

Estimation of the asymptomatic ratio of novel coronavirus infections (COVID-19)

Category:

Topic:

  • Using data on Japanese travelers evacuated from Wuhan, researchers estimate the proportion of infected COVID-19 patients who are asymptomatic (asymptomatic ratio). Recognizing the limitations of the data used in their estimation, the authors conclude that as many as half of all COVID-19 cases may be asymptomatic. 

Nishiura et al. (Feb 17, 2020). Estimation of the asymptomatic ratio of novel coronavirus infections (COVID-19). Pre-print downloaded Feb 18 from https://doi.org/10.1101/2020.02.03.20020248