Covaxin third shot gives long-term immunity: Nature Scientific study

Study shows booster jab is effective against several Sars-CoV-2 strains such as Alpha, Beta, Delta, Delta Plus and Omicron, and also increases memory B-cell response

Bharat Biotech’s Covid-19 vaccine Covaxin’s third dose, delivered six months after the second, increases neutralising antibody responses against several Sars-CoV-2 strains (Alpha, Beta, Delta, Delta Plus and Omicron), as well as memory B-cell response, showed a study published in Nature Scientific Reports.

Bharat Biotech said this study has demonstrated multiple benefits of its vaccine, including long-term immune response, cell-mediated immunity, safety of booster dose, and immunogenicity against the spike protein, N protein and neutralising antibody responses against alpha, beta, delta, delta plus and omicron variants.

“Administration of a third dose six month after the two-dose vaccination dramatically increased  neutralising antibody