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  • Omicron variant has spread to at least 11 states

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  • What we know and don’t know about the omicron variant

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  • American businesses brace for potential impact of omicron variant

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  • CDC expands booster recommendations in response to omicron variant

    02:00
  • Brene Brown discusses ‘Atlas of the Heart,’ her new book about emotions

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  • Omicron variant is worthy of concern but not alarm, doctor says

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  • Experts say omicron COVID-19 variant likely in US already

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  • Dr. Anthony Fauci on new COVID-19 omicron variant: ‘Do not pull back on your guard’

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  • New COVID-19 variant omicron raises concerns as US set to institute travel ban

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Walmart and other retailers mandate masks in their stores starting Monday

02:03

Face masks are now required in more than half of all states, and starting Monday, they are mandatory for all shoppers at Walmart, the nation’s largest retailer, as well as other stores. NBC’s Morgan Chesky reports for TODAY from Dallas.