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Public health responses to COVID-19 outbreaks on cruise ships — Worldwide, February–March 2020
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March 23, 2020
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Description:Please note: This report has been corrected.
What is already known about this topic?: Cruise ships are often settings for outbreaks of infectious Diseases because of their closed environment and contact between travelers from many countries.
What is added by this report?: More than 800 cases of laboratory-confirmed COVID-19 cases occurred during outbreaks on three cruise ship voyages, and cases linked to several additional cruises have been reported across the United States Transmission occurred across multiple voyages from ship to ship by crew members; both crew members and passengers were affected; 10 deaths associated with cruise ships have been reported to date.
What are the implications for public health practice?: Outbreaks of COVID-19 on cruise ships pose a risk for rapid spread of disease beyond the voyage. Aggressive efforts are required to contain spread. All persons should defer all cruise travel Worldwide during the COVID-19 pandemic.
An estimated 30 million passengers are transported on 272 cruise ships Worldwide each year* (1). Cruise ships bring diverse populations into proximity for many days, facilitating Transmission of respiratory illness (2). SARS-CoV-2, the Virus that causes coronaVirus disease (COVID-19) was first identified in Wuhan, China, in December 2019 and has since spread Worldwide to at least 187 countries and territories. Widespread COVID-19 Transmission on cruise ships has been reported as well (3). Passengers on certain cruise ship voyages might be aged ≥65 years, which places them at greater risk for severe consequences of SARS-CoV-2 infection (4). During February–March 2020, COVID-19 outbreaks associated with three cruise ship voyages have caused more than 800 laboratory-confirmed cases among passengers and crew, including 10 deaths. Transmission occurred across multiple voyages of several ships. This report describes public health responses to COVID-19 outbreaks on these ships. COVID-19 on cruise ships poses a risk for rapid spread of disease, causing outbreaks in a vulnerable population, and aggressive efforts are required to contain spread. All persons should defer all cruise travel Worldwide during the COVID-19 pandemic.
During February 7–23, 2020, the largest cluster of COVID-19 cases outside mainland China occurred on the Diamond Princess cruise ship, which was quarantined in the port of Yokohama, Japan, on February 3 (3). On March 6, cases of COVID-19 were identified in persons on the Grand Princess cruise ship off the coast of California; that ship was subsequently quarantined. By March 17, confirmed cases of COVID-19 had been associated with at least 25 additional cruise ship voyages. On February 21, CDC recommended avoiding travel on cruise ships in Southeast Asia; on March 8, this recommendation was broadened to include deferring all cruise ship travel Worldwide for those with underlying health conditions and for persons aged ≥65 years. On March 13, the Cruise Lines International Association announced a 30-day voluntary suspension of cruise operations in the United States (5). CDC issued a level 3 travel warning on March 17, recommending that all cruise travel be deferred Worldwide.
Suggested citation for this article: SSuggested citation for this article: Moriarty LF, Plucinski MM, Marston BJ, et al. Public Health Responses to COVID-19 Outbreaks on Cruise Ships — Worldwide, February–March 2020. MMWR Morb Mortal Wkly Rep. ePub: 23 March 2020. DOI: http://dx.doi.org/10.15585/mmwr.mm6912e3
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Content Notes:Diamond Princess -- Grand Princess -- Additional Ships -- Discussion -- Acknowledgments.
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