Abstract
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.
Keywords
AsymptomaticQuarantineCoronavirus disease 2019 (COVID-19)CruiseSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2)Medicine2019-20 coronavirus outbreakCoronavirus InfectionsPandemicVirologyInternal medicineDiseaseInfectious disease (medical specialty)OutbreakPathologyEngineering
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- Year
- 2020
- Type
- article
- Volume
- 25
- Issue
- 10
- Citations
- 2513
- Access
- Closed
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Cite This
Kenji Mizumoto,
Katsushi Kagaya,
Alexander E. Zarebski
et al.
(2020).
Estimating the asymptomatic proportion of coronavirus disease 2019 (COVID-19) cases on board the Diamond Princess cruise ship, Yokohama, Japan, 2020.
Eurosurveillance
, 25
(10)
.
https://doi.org/10.2807/1560-7917.es.2020.25.10.2000180
Identifiers
- DOI
- 10.2807/1560-7917.es.2020.25.10.2000180