Travelers must complete an online Passenger Locator Form at least 24 hours before arrival. Travelers should carry a printed copy of their Passenger Locator Form and their negative PCR COVID-19 test results for the airline at check-in.
Travelers with a negative COVID-19 PCR test issued within 1-3 days prior to arrival will not be subjected to any further health checks.
Children under the age of 2 are exempt from presenting a COVID-19 test.
Travelers with proof of recovery from the virus within the last 90 days prior to boarding. Proof of a recent positive viral test and a letter from your healthcare provider or a public health official stating that you were cleared to travel.
More info at the CDC site
Travelers who did not get tested, are advised to stay home and self-quarantine for 10 days after travel.