LONDON, Jan. 21 (Xinhua) — A new form of Omicron named BA.2 has been designated a “variant under investigation,” with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday.
“Overall, the original Omicron lineage, BA.1, is dominant in the UK and the proportion of BA.2 cases is currently low,” with the earliest dated Dec. 6, 2021, the