Coronavirus traces found in Diamond Princess cabins for up to 17 days after passengers left

Traces of the coronavirus were found in the cabins on the Diamond Princess cruise ship up to 17 days after passengers left, a study published by the CDC found.

Researchers looked at the rooms of infected passengers aboard the Diamond Princess, both those who showed symptoms and those who didn’t.

The virus “was identified on a variety of surfaces in cabins of both symptomatic and asymptomatic infected passengers up to 17 days after cabins were vacated on the Diamond Princess but before disinfection procedures had been conducted,” the researchers wrote, adding that the finding doesn’t necessarily mean the virus spread by surface.

The ship had more than 700 coronavirus cases. Passengers and crew were quarantined on board off of Yokohama, Japan, and was the largest outbreak outside of mainland China at one point.

CDC researchers found that 46% of the infected passengers and crew members were asymptomatic at the time of testing. The report added that roughly 18% of infected persons never developed symptoms.

“A high proportion of asymptomatic infections could partially explain the high attack rate among cruise ship passengers and crew,” the report said.

The CDC cited several factors that facilitated the dramatic spread, including the mingling of passengers from several regions of the globe.