Estimating the asymptomatic proportion of coronavirus disease 2019 (COVID-19) cases on board the Diamond Princess cruise ship, Yokohama, Japan, 2020
Kenji MizumotoDepartment of Population Health Sciences, School of Public Health, Georgia State University, Atlanta, Georgia, United StatesKatsushi KagayaHakubi Center for Advanced Research, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto, JapanAlexander E. ZarebskiDepartment of Zoology, University of Oxford, Oxford, United KingdomGerardo ChowellDepartment of Population Health Sciences, School of Public Health, Georgia State University, Atlanta, Georgia, United States
2020en
ABI
Аннотация
On 5 February 2020, in Yokohama, Japan, a cruise ship hosting 3,711 people underwent a 2-week quarantine after a former passenger was found with COVID-19 post-disembarking. As at 20 February, 634 persons on board tested positive for the causative virus. We conducted statistical modelling to derive the delay-adjusted asymptomatic proportion of infections, along with the infections' timeline. The estimated asymptomatic proportion was 17.9% (95% credible interval (CrI): 15.5-20.2%). Most infections occurred before the quarantine start.
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