According to the U.S. Centers for Disease Control and Prevention (CDC), SARS-CoV-2 RNA persisted on surfaces aboard the Diamond Princess cruise ship for up to 17 days after infected individuals disembarked.
Quarantined in early February 2020, the Diamond Princess became a key hotspot in the COVID-19 pandemic. Of the 3,711 passengers and crew onboard, 712 tested positive, with 7 fatalities—less than 1% of cases.
As reported by The Independent on March 26, 2020, CDC research detected coronavirus RNA in cabins up to 17 days after infected passengers left. RNA signals the virus's genetic material but does not confirm viability.
The CDC highlighted cruise ships as ideal environments for epidemic spread, especially respiratory viruses—a finding echoed in prior studies. The Diamond Princess offered researchers a unique, controlled setting to study viral behavior, unlike unpredictable community transmission.
Health officials urged postponing all cruise travel to curb SARS-CoV-2 spread. While most of the world's 270 cruise ships halted operations, some continued sailing. The industry paused mid-March 2020 for 30 days, but vessels like one from Oceania Cruises faced port refusals, such as in Santiago, Chile, before returning to Miami, U.S., to disembark passengers.
