http://www.newsweek.com/how-worried-stealth-omicron-ba-2-variant-detected-several-states-1672533

The Omicron BA.2 sub-variant, which has been increasingly detected across Europe and Asia in recent days, has also been found in small numbers in the U.S.

Experts say that it's too soon to speculate on exactly what sort of risk BA.2 poses in comparison to the more dominant Omicron type, BA.1.