India: Mutations make Omicron a monster, taking it lightly can reboot pandemic:

New Delhi: Centre tightens rules for flyers from abroad over Omicron scare. 
In light of the emergence of Omicron variant, the Health Ministry has revised its guidelines for international arrivals in India which will come into effect from December 1, 2021.

Passengers need to submit 14 days' travel details and upload a negative RT-PCR test report on the Air Suvidha portal before the journey.

On November 26, 2021, WHO designated the variant B.1.1.529 a variant of concern, named Omicron, on the advice of WHO's Technical Advisory Group on Virus Evolution