http://www.newsweek.com/omicron-ba-2-covid-variant-symptoms-explained-new-u-s-wave-ba-1-1690861 > Another COVID wave could be on its way in the U.S. as the spread of the COVID sub-variant BA.2 continues, experts have said. > BA.2, a sub-type of the Omicron variant, was estimated to have been found in around 35 percent of U.S. COVID samples between March 13 and March 19, according to the most recent variant proportion data released by the Centers for Disease Control and Prevention (CDC).