The vaccine was then given to members of the public not yet eligible.
A pandemic of the novel coronavirus has now infected more than 80.2 million people worldwide and killed over 1.7 million of them, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.
The TSA screened 1,191,123 people at airport checkpoints nationwide on Wednesday, the highest single day total since the pandemic started, despite the Centers for Disease Control and Prevention advising Americans against traveling for the holidays.
More than 6.3 million passengers have been screened since Dec. 18 .
ABC News’ Sam Sweeney and Ahmad Hemingway contributed to this report.
California now has more than 2 million confirmed cases of coronavirus since the start of the pandemic -- the first state to report the grim milestone.
The state has at least 2,010,004 diagnosed cases and 23,651 deaths, according to data compiled by Johns Hopkins University.
Grant Shapps, the United Kingdom's transportation secretary tweeted that all flights to and from South Africa will be halted starting 9 a.m. Thursday, after a new coronavirus mutation was discovered in that country.
"British & Irish Nationals, visa holders and permanent residents arriving from South Africa will be able to enter but are required to self-isolate for ten days along with their household," he tweeted.
South African nationals won't be allowed to enter the U.K. until the ban is lifted, Shapps said.
With only eight days left, December has already gone down as the deadliest month of the pandemic, according to the COVID Tracking Project.
As of Wednesday, 57,638 Americans died from the virus in December, according to the health data. April is the second deadliest month of the year with 55,267 fatalities, according to the Tracking Project.
The daily hospitalization rate broke another record Wednesday with 119,463 Americans hospitalized with the virus.
"The 7-day average for hospitalizations is at a record 115k," the tracking project tweeted.
