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Now, both the Pfizer and the Moderna booster shots can be given five months after the second dose of vaccine — down from six months.
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The new recommendation for adolescents age 12-17 came hours after a panel of CDC advisers voted in favor of it. The boosters should be given five months after initial immunization.
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In a preemptive move, United, Delta and others canceled dozens of flights scheduled for Friday. They say the omicron spike has left them with staffing shortages.
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Biden used to talk a lot about the COVID-19 death toll, but over the last year he's shifted to how to fight the pandemic. Some want him to go back to addressing the country's grief.
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Americans are scrambling to find out if they're COVID-free so they can go through with their plans. But for many, that means queuing up for hours or tracking down scarce at-home testing kits.
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The medicine, called molnupiravir, is taken twice a day for five days and works by preventing the virus from replicating. Merck says it will have 10 million packs available by the end of the month.
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The new at-home COVID treatment is currently available in limited quantities to states and territories. Some states will get as few as 120 courses of treatment at first.
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University of Washington research predicts the omicron wave will infect more than 400,000 people a day in the U.S. when it crests in about six weeks.
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The U.S. government will buy a half-billion at-home COVID test kits and mail them to people who want them, with deliveries beginning in January.
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Underscoring its high transmissibility, in a week, omicron went from a 12.6% share of new COVID infections in the U.S. to a dominant 73.2%, according to the CDC's latest estimates.
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Moderna said its current FDA-authorized 50-microgram booster shot increased antibody levels against omicron 37-fold compared to pre-booster levels.
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Sporting events and live theater announced cancellations amid major increases in new coronavirus cases, in large part because of the omicron variant.