Two federal advisory committee members say evidence doesnt support a need for four shots.
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The Biden administration will significantly loosen federal mask-wearing guidelines to protect against COVID-19 transmission on Friday, according to two people familiar with the matter.
In an extraordinary move, the Food and Drug Administration had urged Pfizer and its partner BioNTech to apply earlier than the companies had planned.
The decision was bolstered by real-world evidence from the more than 200 million doses administered in the U.S. since the FDA cleared the shot in December 2020.
U.S. health officials on Monday cut isolation restrictions for Americans who catch the coronavirus from 10 to five days, and shortened the time that close contacts need to quarantine.
President Joe Biden announced Tuesday that the government would provide 500 million free rapid tests, increase support for hospitals and redouble vaccination and boosting efforts.
Blood samples taken a month after a booster showed people had levels of omicron-neutralizing antibodies that were similar to amounts proven protective against earlier variants after two doses.
The White House said the U.S. will restrict travel from South Africa and seven other countries in the region beginning Monday.
Pfizer asked U.S. regulators Tuesday to authorize its experimental pill for COVID-19, setting the stage for a likely launch this winter of a promising treatment that can be taken at home.
Pfizer Inc. said Friday that its experimental antiviral pill for COVID-19 cut rates of hospitalization and death by nearly 90 percent in high-risk adults.