by Amir Vera and Shelby Lin Erdman
CNN
Nearly half of the Diamond Princess cruise ship passengers and crew who tested positive for the novel coronavirus were asymptomatic at the time they were tested, according to a new report from the US Centers for Disease Control and Prevention.
Of the 712 passengers and crew members of the ship who tested positive for coronavirus, 331 — or 46.5% — were asymptomatic at the time of testing, the CDC said.
The agency said that the high rate of asymptomatic infections could partly explain the high rate of infection among cruise ship passengers and crew.