FILE - A tourist wearing a face mask enters an area of thermo scan at the quiet Phnom Penh International Airport in Phnom Penh, Cambodia, April 3, 2020. Cambodia on Thursday, April 21, 2022, reduced the quarantine period from two weeks to one for arriving travelers who are not fully vaccinated against the coronavirus, acting after registering consistently low numbers of new infections in recent days. (AP Photo/Heng Sinith, File)