TheDepartmentofHomelandSecurityhassaidtheywouldn't andadultsfromothercountrieswhohavebeenfullyvaccinatedwillstillhavetoshow a negativecovidtestwithinthreedaysoftheirflightstotheUSamericanswhoaretravelingabroadorbackhomewillnotberequiredtohavehadthevaccinebuttheywillhavetoshow a negativecovidtestwithinonedayoftheirflightoutandaftertheygethomethough, criticshavesaidit's notclearhowthegovernmentwillenforcethat.