The move by the Food and Drug Administration tweaks the recipe of shots made by Pfizer and rival Moderna that already have saved millions of lives.
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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.
Health officials are still urging caution to avoid a fourth wave of the pandemic sweeping across much of the U.S. and other parts of the world.
The Pew Research Center breaks down the changes as families hunkered down amid employment turmoil, activity restrictions and school closures.
California on Sunday reported another 481 coronavirus deaths, a day after the statewide death toll topped 40,000 even as the rates of new infections and hospitalizations continue to fall.
California officials decried anti-vaccination protesters who forced the temporary shutdown of the inoculation center at Dodger Stadium, stalling hundreds of motorists who had been waiting in line for hours.
Casinos run by the Navajo Nation plan to temporarily lay off more than 1,100 workers on New Years Day because of prolonged closures caused by the coronavirus pandemic.
California surpassed 25,000 coronavirus deaths since the start of the pandemic, reporting the grim milestone Thursday as an ongoing surge swamps hospitals and pushes nurses and doctors to the breaking point as they brace for another likely increase after the holidays.
In New York’s Times Square, the ball dropped like always, but police fenced off the site synonymous with New Year’s Eve to prevent crowds of any size from gathering.
The race to vaccinate millions of Americans is off to a slower, messier start than public health officials and leaders of the Trump administration’s Operation Warp Speed had expected.