YOKOHAMA, JAPAN - FEBRUARY 19: A man waves from a bus carrying passengers who disembarked the quarantined Diamond Princess cruise ship as he leaves the Daikoku Pier on February 19, 2020 in Yokohama, Japan. About 500 passengers who have tested negative for the coronavirus (COVID-19) were allowed to disembark the cruise ship on Wednesday after 14 days quarantine period as at least 542 passengers and crew onboard have tested positive for the coronavirus. Including cases onboard the ship, 615 people in Japan have now been diagnosed with COVID-19 making it the worst affected country outside of China.  (Photo by Tomohiro Ohsumi/Getty Images)