FILE – In this July 2, 2021 file photo, a United Airlines jetliner taxis down a runway for take off from Denver International Airport in Denver. The vast majority of United Airlines employees are deciding to get vaccinated against COVID-19 rather than risk losing their job. United said Wednesday, Sept. 22, that more than 97% of its U.S.-based employees are fully vaccinated. (AP Photo/David Zalubowski, file) (David Zalubowski/AP)
