Effective January 26, the Centers for Disease Control and Prevention (CDC) will require all air passengers entering the United States (including U.S. citizens and Legal Permanent Residents) to present a negative COVID-19 test, taken within three calendar days of departure​, or proof of recovery from the virus within the last 90 days. Airlines must confirm the negative test result or proof of recent recovery for all passengers prior to boarding. ​Airlines must deny boarding of passengers who do not provide documentation of a negative test or recovery.