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U.S. COVID cases surge ahead of holidays

New cases of the Omicron variant are spreading rapidly in the U.S. ahead of the holidays. People are dealing with long lines at testing sites across the nation. At-home testing kits are also short in supply and pharmacies are limiting how many customers can buy. CBS News correspondent Nancy Chen reports from New York City. Then critical care physician Dr. Lakshmana Swamy joins CBSN's Debra Alfarone to discuss the latest on the pandemic.

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Scientists learn more about risk from Omicron

New studies out of South Africa and the U.K. suggest the Omicron variant is less likely to cause hospitalizations -- but it can still be deadly. The FDA also authorized a new antiviral pill to treat COVID-19. CBS News' Nancy Chen reports on the latest, and then Dr. Amesh Adalja, an infectious disease expert at Johns Hopkins University Bloomberg School of Public Health, spoke with Jessi Mitchell on CBSN about the Omicron research and how some patients are experiencing different symptoms than earlier strains.

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FDA authorizes Pfizer pill to treat COVID

The Food and Drug Administration announced Wednesday it has authorized Pfizer's antiviral pill to treat COVID-19 as the new Omicron variant hits all 50 U.S. states. CBS News correspondent Nancy Chen reports on how the new strain is causing disruptions across the country. Then, CBS News correspondent Mark Strassman has the latest on Omicron's impact on travel as tens of millions of Americans hit the road for the holidays. And lastly, Dr. Elizabeth Clayborne, an adjunct assistant professor of emergency medicine at the University of Maryland School of Medicine, joins Elise Preston on CBSN to break down the day's headlines.

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Health officials warn unvaccinated Americans

Health officials fear the highly contagious Omicron strain, already detected in 40 states, will become the nation's most dominant coronavirus variant in the coming weeks, and urged Americans to get vaccinated and boosted. Dr. Len Horovitz, a pulmonary specialist at Lenox Hill Hospital in New York City, joins CBSN to discuss the CDC's decision to no longer recommend Johnson and Johnson's one-dose vaccine to unvaccinated Americans and other coronavirus-related news.

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One year since first Pfizer vaccination

It has been exactly one year since the Food and Drug Administration authorized the Pfizer vaccine — the first of three COVID-19 vaccines now in use in the United States. During that time, more than 480 million shots have been administered. But even with those protections, case numbers have gone up 22% in the past two weeks. That sharp increase is a stark reminder that despite the effectiveness of the vaccines, the virus is still able to spread. Michael George has the latest.

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