The three samples which have been sent for genomic sequencing include samples of a medical professional who arrived from the U.K, and his mother, along with a Tamil man who arrived at Kozhikode from Germany.
As many as 53,86,393 eligible adults have been administered the second dose, he said, adding Himachal Pradesh was also the first state to achieve the 100 percent first dose vaccination of the adult population by the end of August.
The case came a day after the U.S. announced its first case of the omicron variant of the coronavirus had been detected in California, in a person who had recently traveled to South Africa.