Effective December 6, 2021, all passengers from all airlines are required to provide a proof of negative COVID-19 test result or recovery from COVID-19 entering into the U.S. The Centers for Disease Control and Prevention (CDC) within the Department of Health and Human Services (HHS) amended its October 25, 2021 Amended Order, titled, “Requirement for Proof of Negative COVID-19 Test or Recovery from COVID-19 for All Air Passengers Arriving in the U.S.” Read more.