New Delhi: Amid reports claiming that the World Health Organization has said that the Indian Covid-19 variant has been found in 44 countries, the Centre on Wednesday said that WHO has not classified this variant as "Indian". "The word 'Indian' has not been used in its report on the matter," the Centre said. WHO has classified B.1.617 as a variant of global concern, but many reports termed the mutant as "Indian variant", which is unfounded and without any basis, the Centre said.

This variant is the fourth "variant of concern" after those detected in Britain, Brazil and South Africa. It was added to the list as it "appears to be transmitting more easily than the original virus", it said.

This variant, also known as the double mutant, leads to loss of neutralisation of antibodies. The emergence of this variant is being seen as a factor behind the sudden surge in the number of vases. According to reports, the variant has been detected in more than 4,500 samples from 44 countries in six WHO regions. But in its document, WHO has not termed this double mutant strain as an Indian variant, the Centre said.

The double mutant virus was first detected on October 5, 2020, as was not so much widespread in India. But on April 1, this strain accounted for 80 per cent of all analysed genome sequences of mutant variants. The Centre did not establish a link between this variant and the surge of the cases in India during March-April but said it might be one of the reasons. Variants are natural in a virus and some variants are more potent than others, it said. Both Covishield and Covaxin, the two vaccines available in India, are effective against this strain, the Institute of Genomics and Integrative Biology said.