More Contagious Omicron BA.2 on Track to Displace Other Variants in U.S. in Next Two Weeks

White House chief medical advisor Dr. Anthony Fauci has said he doesn't expect BA.2 to cause another major surge.

The more contagious omicron BA.2 subvariant now makes up 72% of Covid infections that have undergone genetic sequencing in the U.S., according to data from the Centers for Disease Control and Prevention. BA.2 became dominant in the U.S. last week, and now appears on track to displace the earlier version of omicron, BA.1. Ali Mokdad, an epidemiologist at the Institute for Health Metrics and Evaluation in Washington state, projected that will happen within the next two weeks.

Though some estimates differ, BA.2 spreads 30% to 80% faster than BA.1., according to data from public health authorities in the U.K. and Denmark.

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