A test tube labeled “COVID-19 Test Positive” can be seen in this illustration dated December 11, 2021 in front of the words “OMICRON SARS-COV-2”.
Given Ruvic | Reuters
The omicron Covid-19 variant has quickly overtaken Delta as the dominant strain of the virus in the US, accounting for 90% of cases in some parts of the country, said CDC director Dr. Rochelle Walensky on Wednesday.
The variant accounts for more than 73% of cases in the US on Saturday, according to the latest data from the Center for Disease Control and Prevention. Last week, US health officials said Omicron accounted for 2.9% of all cases sequenced by December 11, but later revised that number to 12.6%.
Walensky said the highly mutated and contagious strain is responsible for up to 90% of infections in the eastern Atlantic states, parts of the Midwest, the southern and northern Pacific states.
“This rapid increase in the percentage of omicrons circulating across the country is similar to what we’ve seen around the world,” she told reporters during a press conference on Covid-19 at the White House.
This story evolves. Check again for updates.