WHO tracking Omicron sub-variants as Covid transmission may lead to more deaths
World Health Organisation is tracking four sub-lineages of Omicron, the variant of concern as the virus continues to evolve. WHO chief said that it would be premature to declare victory over Covid.
Tedros Adhanom Ghebreyesus World Health Organisation Covid Cases Who Warning Omicron Variant Omicron Ba2
Source: indiatoday.in