The Centre has written to the states and UTs over the possible threat of new Covid-19 variant B.1.1.529 which has been designated as the 'Variant of Concern' (VOC) by the World Health Organisation. The Centre has urged states and UTs to do rigorous surveillance of international passengers.

"ln view of the possible threat that this VoC can pose to the nation, it is imperative that the intensive containment, active surveillance, increased coverage of vaccination and Covid Appropriate Behaviour must be enforced in the field in a very proactive manner to effectively manage this VoC", said the letter to the states and UTs.