Researchers at the Broad Institute of MIT and Harvard estimate that the highly mutated omicron variant has been dominant in Massachusetts since Dec. 17, less than two weeks after it was first detected in a fully vaccinated woman in Middlesex County.
For Massachusetts, that's a major jump from the week prior, when the mutation made up less than 2% of new cases.
Based on the trends observed during this time period, the researchers estimate omicron exceeded 50% of cases in Massachusetts on Friday and is"rapidly increasing across the state.", like whether the variant is more contagious or deadly, remain unanswered. Various new variants of COVID have swept across the globe since the start of the pandemic as the virus mutates.
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