Effective January 5, at 12:01 ET, the CDC is requiring a negative COVID-19 test result (taken within two days of departure) or proof of recovery from the virus (within the last 90 days) for all travelers aged two years and older to the United States on flights originating from China, Hong Kong and Macau. This requirement also applies to individuals boarding a flight to the United States from international airports in Seoul, Vancouver and Toronto who have been in the PRC, Hong Kong and Macau within ten days previous to travel.
For detailed information, refer to: