インド、デンマーク、スウェーデンでオミクロン株を由来とする別の変異株(BA.2)が感染拡大している模様

Studies are underway to find out the precise characteristics of the latest Covid-19 variant ‘BA.2’.
It already accounts for the majority of most recent cases in a number of countries, including India, Denmark and Sweden.

"Scientists scrutinise characteristics of new Omicron sub-variant BA.2"
https://www.france24.com/en/france/20220122-scientists-scrutinise-characteristics-of-new-covid-19-omicron-sub-variant-ba-2