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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.

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/content/10.2807/1560-7917.ES.2020.25.10.2000180
2020-03-12
2020-04-04
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2020.25.10.2000180
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References

  1. Ministry of Health. Labour and Welfare, Japan. Coronavirus Disease (COVID-19) Situation Report in Japan. Tokyo: Ministry of Health, Labour and Welfare, Japan. Japanese. Available from: https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000164708_00001.html
  2. Backer JA, Klinkenberg D, Wallinga J. Incubation period of 2019 novel coronavirus (2019-nCoV) infections among travellers from Wuhan, China, 20-28 January 2020. Euro Surveill. 2020;25(5).  https://doi.org/10.2807/1560-7917.ES.2020.25.5.2000062  PMID: 32046819 
  3. World Health Organization (WHO). Coronavirus disease (COVID-2019) situation reports. Geneva: WHO. [Accessed Mar 2020]. Available from: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports
  4. Linton NM, Kobayashi T, Yang Y, Hayashi K, Akhmetzhanov AR, Jung SM, et al. Epidemiological characteristics of novel coronavirus infection: A statistical analysis of publicly available case data. medRxiv. 2020.01.26.20018754; (Preprint). http://dx.doi.org//10.1101/2020.01.26.20018754
  5. Kroon FP, Weiland HT, van Loon AM, van Furth R. Abortive and subclinical poliomyelitis in a family during the 1992 epidemic in The Netherlands. Clin Infect Dis. 1995;20(2):454-6.  https://doi.org/10.1093/clinids/20.2.454  PMID: 7742455 
  6. Mbabazi WB, Nanyunja M, Makumbi I, Braka F, Baliraine FN, Kisakye A, et al. Achieving measles control: lessons from the 2002-06 measles control strategy for Uganda. Health Policy Plan. 2009;24(4):261-9.  https://doi.org/10.1093/heapol/czp008  PMID: 19282484 
  7. Smallman-Raynor MR, Cliff AD, editors. Poliomyelitis: Emergence to Eradication. New York: Oxford University Press; 2006;32.
  8. Miura F, Matsuyama R, Nishiura H. Estimating the Asymptomatic Ratio of Norovirus Infection During Foodborne Outbreaks With Laboratory Testing in Japan. J Epidemiol. 2018;28(9):382-7.  https://doi.org/10.2188/jea.JE20170040  PMID: 29607886 
  9. Mizumoto K, Kobayashi T, Chowell G. Transmission potential of modified measles during an outbreak, Japan, March‒May 2018. Euro Surveill. 2018;23(24).  https://doi.org/10.2807/1560-7917.ES.2018.23.24.1800239  PMID: 29921344 
  10. Novel Coronavirus Pneumonia Emergency Response Epidemiology Team. [The epidemiological characteristics of an outbreak of 2019 novel coronavirus diseases (COVID-19) in China]. Zhonghua Liu Xing Bing Xue Za Zhi. 2020;41(2):145-51.  https://doi.org/10.3760/cma.j.issn.0254-6450.2020.02.003  PMID: 32064853 
  11. Hoehl S, Rabenau H, Berger A, Kortenbusch M, Cinatl J, Bojkova D, et al. Evidence of SARS-CoV-2 Infection in Returning Travelers from Wuhan, China. N Engl J Med. 2020;41(2):NEJMc2001899.  https://doi.org/10.1056/NEJMc2001899  PMID: 32069388 
  12. Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020;395(10223):497-506.  https://doi.org/10.1016/S0140-6736(20)30183-5  PMID: 31986264 
  13. Nishiura H, Kobayashi T, Miyama T, Suzuki A, Jung S, Hayashi K, et al. Estimation of the asymptomatic ratio of novel coronavirus infections (COVID-19). medRxiv. 17 Feb 2020.  https://doi.org/http://dx.doi.org/10.1101/2020.02.03.20020248 
  14. Zou L, Ruan F, Huang M, Liang L, Huang H, Hong Z, et al. SARS-CoV-2 Viral Load in Upper Respiratory Specimens of Infected Patients. N Engl J Med. 2020;41(2):NEJMc2001737.  https://doi.org/10.1056/NEJMc2001737  PMID: 32074444 
  15. Centers for Disease Control and Prevention (CDC). Interim US Guidance for Risk Assessment and Public Health Management of Persons with Potential Coronavirus Disease 2019 (COVID-19) Exposure in Travel-associated or Community Settings. Atlanta: CDC. [Accessed 2 Mar 2020]. Available from https://www.cdc.gov/coronavirus/2019-ncov/php/risk-assessment.html
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