Six Covid-19 cases were reported after screening 3,476 passengers of 11 flights that arrived in India from "at-risk" countries and the samples have been sent for genomic sequencing, the Health Ministry said amid concerns over the 'Omicron' variant of coronavirus.

The Centre's revised guidelines for international travellers came into effect on Wednesday. The fresh guidelines have been issued because of the new SARS-Cov-2 variant which has been designated as a 'variant of concern (VOC)' by the World Health Organisation. "On the first day of operation of the Guidelines for International Travellers issued by the Centre as public health response measures for control and management of the newly reported variant of coronavirus, which has been designated as a 'variant of concern' by WHO, six passengers were reported to be Covid positive," the Union Health Ministry said.