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Epidemiology of COVID-19 Outbreak on Cruise Ship Quarantined at Yokohama, Japan, February 2020.
Emerg Infect Dis. 2020 11; 26(11):2591-2597.EI

Abstract

To improve understanding of coronavirus disease (COVID-19), we assessed the epidemiology of an outbreak on a cruise ship, February 5-24, 2020. The study population included persons on board on February 3 (2,666 passengers, 1,045 crew). Passengers had a mean age of 66.1 years and were 55% female; crew had a mean age of 36.6 years and were 81% male. Of passengers, 544 (20.4%) were infected, 314 (57.7%) asymptomatic. Attack rates were highest in 4-person cabins (30.0%; n = 18). Of crew, 143 (13.7%) were infected, 64 (44.8%) asymptomatic. Passenger cases peaked February 7, and 35 had onset before quarantine. Crew cases peaked on February 11 and 13. The median serial interval between cases in the same cabin was 2 days. This study shows that severe acute respiratory syndrome coronavirus 2 is infectious in closed settings, that subclinical infection is common, and that close contact is key for transmission.

Authors

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32822290

Citation

Expert Taskforce for the COVID-19 Cruise Ship Outbreak. "Epidemiology of COVID-19 Outbreak On Cruise Ship Quarantined at Yokohama, Japan, February 2020." Emerging Infectious Diseases, vol. 26, no. 11, 2020, pp. 2591-2597.
Expert Taskforce for the COVID-19 Cruise Ship Outbreak. Epidemiology of COVID-19 Outbreak on Cruise Ship Quarantined at Yokohama, Japan, February 2020. Emerg Infect Dis. 2020;26(11):2591-2597.
Expert Taskforce for the COVID-19 Cruise Ship Outbreak. (2020). Epidemiology of COVID-19 Outbreak on Cruise Ship Quarantined at Yokohama, Japan, February 2020. Emerging Infectious Diseases, 26(11), 2591-2597. https://doi.org/10.3201/eid2611.201165
Expert Taskforce for the COVID-19 Cruise Ship Outbreak. Epidemiology of COVID-19 Outbreak On Cruise Ship Quarantined at Yokohama, Japan, February 2020. Emerg Infect Dis. 2020;26(11):2591-2597. PubMed PMID: 32822290.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Epidemiology of COVID-19 Outbreak on Cruise Ship Quarantined at Yokohama, Japan, February 2020. A1 - ,, Y1 - 2020/08/21/ PY - 2020/8/22/pubmed PY - 2020/11/5/medline PY - 2020/8/22/entrez KW - 2019 novel coronavirus disease KW - COVID-19 KW - Japan KW - SARS-CoV-2 KW - coronavirus disease KW - cruise ship KW - epidemiology KW - quarantine KW - severe acute respiratory syndrome coronavirus 2 KW - viruses KW - zoonoses SP - 2591 EP - 2597 JF - Emerging infectious diseases JO - Emerg Infect Dis VL - 26 IS - 11 N2 - To improve understanding of coronavirus disease (COVID-19), we assessed the epidemiology of an outbreak on a cruise ship, February 5-24, 2020. The study population included persons on board on February 3 (2,666 passengers, 1,045 crew). Passengers had a mean age of 66.1 years and were 55% female; crew had a mean age of 36.6 years and were 81% male. Of passengers, 544 (20.4%) were infected, 314 (57.7%) asymptomatic. Attack rates were highest in 4-person cabins (30.0%; n = 18). Of crew, 143 (13.7%) were infected, 64 (44.8%) asymptomatic. Passenger cases peaked February 7, and 35 had onset before quarantine. Crew cases peaked on February 11 and 13. The median serial interval between cases in the same cabin was 2 days. This study shows that severe acute respiratory syndrome coronavirus 2 is infectious in closed settings, that subclinical infection is common, and that close contact is key for transmission. SN - 1080-6059 UR - https://www.unboundmedicine.com/medline/citation/32822290/Epidemiology_of_COVID_19_Outbreak_on_Cruise_Ship_Quarantined_at_Yokohama_Japan_February_2020_ L2 - https://doi.org/10.3201/eid2611.201165 DB - PRIME DP - Unbound Medicine ER -