Bharat Biotech has said its vaccine Covaxin is effective against the aggressively virulent B.1.167 strain of Covid detected in India and the UK variant of the virus B.1.1.7. The study -- conducted by India's National Institute of Virology and the Indian Council of Medical Research -- has been published in a peer-reviewed journal, Clinical Infectious Diseases. Bharat Biotech said according to the research, Covaxin "produced neutralising titres (meaning the concentration of antibodies) against all key emerging variants".