The Princess Diamond cruise ship and its 3,711 individuals onboard underwent a two-week quarantine in Yokohama, Japan beginning on February 5, 2020. The estimated asymptomatic proportion was found to be 17.9% (95% credible interval: 15.5%-20.2%).

Estimating the asymptomatic proportion of coronavirus disease 2019 (COVID-19) cases on board the Diamond Princess cruise ship, Yokohama, Japan, 2020

University of Michigan - Ann Arbor

- China
- Germany
- Japan
- USA
- Singapore

Asymptomatic COVID-19 Infection Categorized by Country

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