Omicron Subvariant Infections Double Each Week in Feb in the USA

A highly transmissible Omicron subvariant BA.2 was responsible for 11.6 percent of coronavirus infections in the USA in the week ending March 5, the Center for Disease Control and Prevention estimated.

Cases of the same variant were doubling each week over the past month, according to the data updated on Tuesday by the CDC.

While the variant accounted for only 1 percent of new cases in the week ending February 5, cases rose to 2.2 percent in the week ending February 12, 3.8 percent in the week ending February 19, and 6.6 percent in the week ending February 26, CDC data showed.

Experiments suggest that BA.2 may be capable of causing more severe disease than the original Omicron strain.

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