A day after the Indian Council of Medical Research (ICMR) announced that Covaxin fights the so-called double mutant, B.1.617, the city-based Centre for Cellular and Molecular Biology (CCMB) said on Thursday that the Covishield vaccine, too, protects people from the new mutant.A day after the Indian Council of Medical Research (ICMR) announced that Covaxin fights the so-called double mutant, B.1.617, the city-based Centre for Cellular and Molecular Biology (CCMB) said on Thursday that the Covishield vaccine, too, protects people from the new mutant.