
The Department of Medical Sciences (DMS) is studying whether the BA.2 sub-variant of the Omicron variant is more virulent than its cousins, says director-general Dr Supakit Sirilak.
He was responding to concerns that BA.2 could trigger a more serious Covid-19 infection situation in Thailand when compared with the sub-variant BA.1, as more cases of BA.2 have now been detected here recently.