Covaxin Booster Shown To Neutralise Both Omicron And Delta Variants Of COVID-19: Bharat Biotech Covaxin Booster Shown To Neutralise Both Omicron And Delta Variants Of COVID-19: Bharat Biotech Covaxin Booster Shown To Neutralise Both Omicron And Delta Variants Of COVID-19: Bharat Biotech