Mexico began a mass vaccination campaign, the first Latin American country to do so.
Federal officials said the U.S. had vaccinated fewer people than they had hoped by this point, but they said it was still likely that 100 million Americans would be vaccinated by March.
More than one million people have received a dose of a virus vaccine in the U.S. This map breaks it down by state.
As of Monday, the U.S. will require all airline passengers arriving from Britain to have a negative virus test that is less than 72 hours old.
More than one million people passed through U.S. airports on Wednesday, the highest number since March. Pre-Christmas travel is still down by about 60 percent compared with last year.
The New York Times
