Vaccinated passengers arriving on domestic flights are required to indicate a unfavorable test end result taken inside forty eight hours before arrival time. Testing upon return to the mainlandPuerto Rico is a U.S. territory and excluded from the CDC requirement to offer a unfavorable COVID-19 check outcome to return to the mainland United States. A steady evaluation of the situation in Puerto Rico and the United States influences Island-wide orders that prioritize the health and security of residents and visitors. Mask UsageMasks are required indoors, regardless of age or vaccination status.