Omicron BA.4 and BA.5 variants will not lead to case surge, but vigilance needed, says expert
By Shalini BhardwajNew Delhi [India], May 24 (ANI): After India witnessed cases…
Tamil Nadu reports BA.4 sub-variant of Omicron, claims Health Minister
Chennai (Tamil Nadu) [India], May 21 (ANI): India's first case of BA.4…