It is highly probable that the vast majority of people on the Diamond Princess cruise ship were exposed to SARS-CoV-2.

“I just can't imagine that the vast majority people on the Diamond Princess did not get exposed come into contact with coronavirus that is get Tsarskoe b2 on their hand touch their face get the virus in their posterior farik's in their throat and have the virus inside of them right how could you possibly be on a ship where there's an outbreak and not see the virus when you're sharing the same overhead ventilation system when you're below decks when everyone is walking around the ship”