The countries reached a deal Tuesday after France initially closed its borders to U.K. travelers on Sunday following news of an outbreak of a new strain of the coronavirus in England.
The new deal effectively doubles the federal government's order from the company. Pfizer says the U.S. government has agreed to pay $1.95 billion for the additional doses.
The drugmakers will add an additional 100 million COVID-19 vaccine doses to the number that they are already supplying the government. They expect to deliver all the doses by July 31.
When COVID-19 cases peaked in Arizona over the summer, the state closed some businesses and set benchmarks for when they could reopen. As new cases surge, businesses aren't required to close again.
Parts of California have reached 0% capacity in ICUs, and hospitals are considering when to invoke crisis standards of care. That could lead to some patients being prioritized over others.
President Trump demands changes to pandemic relief bill, and he pardoned 15 people and commuted sentences of five others. France reopens border with Britain after new COVID-19 strain is detected.
Many U.S. hospitals are struggling to find enough space and staff to treat COVID-19 patients. The surge in new cases has forced them to rethink how they use space, manage staff, and handle treatment.
"I will be helpful in any role that people think I can be helpful in, and then I will retire," Birx, who has spend more than three decades in public health service, told Newsy on Tuesday.