Previously, fully vaccinated travelers could provide proof of a negative test taken within 72 hours of departure. The new requirement may be difficult for some to satisfy, because it can take more than a day to receive test results. The new rules have some travelers wondering if they can stick to their planned itineraries. Aug. Sept. Oct. Nov. Dec. Sources: Center for Systems Science and Engineering at Johns Hopkins University and state and local health agencies (cases); World Bank and U.S. Census Bureau (population data). The stricter testing requirement for inbound travelers took effect just as airline travel was experiencing a rebound.

Source: The Times December 12, 2021 01:13 UTC