When the CDC issued new guidance regarding its COVID testing requirement for international travel, effective December 6, 2021, many U.S. travelers who were already abroad had to scramble to do a COVID test within a calendar day of coming home. The new rules shorten the testing period from three days to one and apply to all travelers—vaccinated or not—ages two and up. CDC’s COVID-19 Program for Cruise Ships is no longer in effect. CDC will continue to publish guidance to help cruise ships continue to provide a safer and healthier environment for passengers, crew and communities. If you have been fully vaccinated, the CDC states that you don’t need to get tested before or after your trip within the U.S. or stay home (quarantine) after you return. August 23 &8211; CDC updated COVID-19 guidance in August 2022, recommending that people exposed to COVID-19 wear a high-quality mask for 10 days and get tested on day 5. Quarantining is no longer recommended or necessary. You should isolate, regardless of vaccination status, if: