Both Covaxin and Covishield are effective against the UK variant, according to officials. The UK variant is one the two prevailing mutations found in the country. So far there has been no Indian variant as only a double mutation has been found in Maharashtra. It requires multiple mutations for a new variant to be recognised and to make a discernible impact. So far, three “imported variants” — UK, South Africa and Brazilian — have been detected in India. The total number of cases with these variants of the Covid-19 virus adds up to 948 till Monday evenings.