U.S. Begins Evacuating Americans From Quarantined Cruise Ship

A cruise ship in Yokohama has been quarantined due to a coronavirus outbreak, with over 350 cases confirmed. The National Institute of Health reported more than 40 infected Americans. Passengers aged 80 or older with medical conditions or windowless rooms could disembark if they tested negative. American passengers can voluntarily return to the US, where they will be monitored for 14 days at military bases.

What conditions allowed certain passengers to disembark the ship?

What will happen to American passengers who choose to return to the US?