A new @CDCMMWR summarizes what’s known about the 1st U.S. #COVID19 #Omicron cases. The Delta variant accounts for more than 99.9% of variants circula…


A new @CDCMMWR summarizes what’s known about the 1st U.S. #COVID19 #Omicron cases. The Delta variant accounts for more than 99.9% of variants circulating in the U.S., but mask up and get vaccinated to help protect against all variants. More: http://bit.ly/MMWR7050e1

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