http://www.newsweek.com/ba-2-stealth-omicron-variant-dominant-america-covid-samples-cases-1689391

The Omicron BA.2 sub-type may become the dominant COVID variant in the U.S. within weeks, experts said.

BA.2 has increased quickly as a proportion of U.S. cases in recent weeks. According to the most recent projections from the U.S. Centers for Disease Control and Prevention (CDC), BA.2 is estimated to have been found in 23.1 percent of sequenced COVID samples in the U.S. between March 6 and March 12.