In his address to the nation, PM Modi also said that "precautionary doses", or booster dose of Covid-19 vaccine, would be administered to healthcare and frontline workers and people above 60 years of age with co-morbidities from January 10.

Meanwhile, the Omicron case tally in India reached 422 on Sunday. The maximum number of cases, 108, were reported from Maharashtra. Meanwhile, Delhi registered 79 cases of Omicron, followed by Gujarat with 43, Telangana with 41 cases and Kerala with 38 cases.