President Biden traveled to Chicago on Thursday to talk about vaccine mandates.
Chicago was picked in part because it is the home of United Airlines, one of the first major carriers to require shots for its 67,000 U.S. employees. Other airlines have followed with similar requirements, including American Airlines, Southwest, JetBlue and Alaska Airlines.
Jeff Zients, the White House coronavirus response coordinator, announced the trip on Wednesday and said that Mr. Biden would focus on the success of vaccine mandates.
Mr. Biden said last month that he would use his presidential powers to require that two-thirds of American workers be vaccinated against the coronavirus. That included a private sector to mandate that all companies with more than 100 workers require vaccination or weekly testing.
He also moved to mandate shots for health care workers, federal contractors and most federal workers, who could face disciplinary measures if they decline to be inoculated.
Mr. Biden talked about the impact that those requirements are having .
United Airlines has said that it would terminate about 600 employees for not complying with its vaccination requirement. About 99 percent of its U.S. work force has been vaccinated, according to the airline.