A 32-year-old man who tested positive for coronavirus here in Maharashtra after returning from South Africa has been kept in isolation at a civic Covid-19 care centre and his sample has been sent for genome sequencing, amid concerns over the potentially more transmissible new 'Omicron' variant of the virus, an official said on Monday.

The result will be known after seven days, Kalyan Dombivli Municipal Corporation's (KDMC) epidemic control officer Dr Pratibha Panpatil said.