In hopes of getting a better sense of which SARS-CoV-2 variants might be coming into the U.S., the Centers for Disease Control and Prevention recently expanded its voluntary testing of some passengers exiting from international flights at certain airports. Rick Bowmer/AP hide caption
Passengers at O'Hare International Airport, in Chicago, wait in line to be screened at a Transportation Security Administration checkpoint in 2016. Scott Olson/Getty Images hide caption
Masks are just one protective measure for these airline passengers arriving in Shanghai from Paris. Hector Retamal/AFP via Getty Images hide caption
Travelers sit in a waiting area at Rhode Island T.F. Green International Airport in Providence, R.I., on April 19. A federal judge's decision to strike down the federal mask mandate has left travelers to assess the risks of public transit on their own. David Goldman/AP hide caption
An American Airlines flight to Washington, D.C., was diverted to Kansas City, Mo., on Sunday due to an unruly passenger. Alan Diaz/AP hide caption
Air passengers heading to their departure gates enter TSA PreCheck at Orlando International Airport. Access to PreCheck could now be revoked for unruly passengers. John Raoux/AP hide caption
International visitors who fly into the U.S. will have a new set of rules and requirements regarding COVID-19 vaccines, starting Nov. 8. Angus Mordant/Bloomberg via Getty Images hide caption
Passengers queue up at Greece's Thessaloniki Makedonia Airport on Sept. 2. Recommendations about physical distancing prove hard to follow at airports — and in the jetway leading to the plane. Konstantinos Tsakalidis/Bloomberg via Getty Images hide caption
An illustration of the Overture supersonic airliner designed by the Boom Supersonic company of Denver, Colo. United Airlines announced it will purchase 15 of the planes for commercial passenger service. United Airlines hide caption
A woman walks past posters explaining mask requirements at Grand Central Terminal train station in New York City on Wednesday. Rules requiring masks on transit are unchanged by the Centers for Disease Control and Prevention's updated mask guidance for fully vaccinated people. Angela Weiss/AFP via Getty Images hide caption
Prime Minister Jacinda Ardern announced that quarantine-free travel between New Zealand and Australia will start on April 19. Hagen Hopkins/Getty Images hide caption
The Centers for Disease Control and Prevention updated its domestic travel guidance for fully vaccinated people on Friday, lifting certain requirements while continuing to advise mitigation measures like mask-wearing and hand-washing. Angus Mordant/Bloomberg via Getty Images hide caption
For lighter moments during the coronavirus pandemic, passersby had an opportunity to vote for their stay at home spring break moments on the retaining wall of a home in St. Paul, Minn. Jim Mone/AP hide caption
A British Airways plane comes in to land behind a tail fin at Heathrow Airport in London. On Friday, the head of the group that owns BA called for instituting an electronic health pass for passengers as the company announced steep losses due to COVID-19. Kirsty Wigglesworth/AP hide caption
