COVAXIN® (BBV152) booster dose study shows Promising Results

The phase 2, double-blind, randomised controlled COVAXIN^® trial demonstrated long-term safety with no serious adverse events.
6 months after receipt of the second COVAXIN^® dose:

India

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Hyderabad/New Delhi, January 08, 2022:

Bharat Biotech, a global leader in vaccine innovation and developer of vaccines for infectious diseases, today announced the results from the highly anticipated trial studying the immunogenicity and safety of the COVAXIN^® (BBV152) a whole-virion inactivated COVID-19 vaccine as a booster dose.

This analysis re-emphasises Bharat Biotech’s continued efforts to stay ahead of COVID-19, and this update provides a comprehensive vaccine booster strategy. COVAXIN^®is the first vaccine (in India) to report safety and immunogenicity results from a booster clinical trial. The analysis showed, six months after a two-dose BBV152 vaccination series cell-mediated immunity and neutralising antibodies to both homologous (D614G) and heterologous strains (Alpha, Beta, Delta, and Delta plus) persisted above baseline, although the magnitude of the responses had declined.

Furthermore, Neutralising antibodies against homologous and heterologous SARS-CoV-2 variants increased 19 to 265 fold after a third vaccination. Booster BBV152 vaccination is safe and may be necessary to ensure persistent immunity to prevent breakthrough infections.

Dr. Krishna Ella, Chairman and Managing Director of Bharat Biotech, said, “These trial results provide a strong foundation towards our goal to provide COVAXIN^® as a booster dose. Our goals of developing a global vaccine against COVID-19 have been achieved. COVAXIN^® is now indicated for adults, children, 2 dose primary and booster doses. This enables the use of COVAXIN^® as an universal vaccine.”

We found the vaccine induces both memory B and T cells with a distinct CD4 and CD8 phenotype.

Further, reactogenicity after vaccine and placebo was minimal and comparable, and no serious adverse events were reported.

While protection against the severe disease remains high across the full 6 months, a decline in efficacy against symptomatic disease over time and the continued emergence of variants are expected. Based on emerging data, Bharat Biotech believes that a third dose may be beneficial to maintain the highest levels of protection.

COVAXIN^® is formulated uniquely such that the same dosage can be administered to adults and children alike. COVAXIN^® is ready-to-use a liquid vaccine, stored at 2- 8°C, with 12 months shelf life and multi-dose vial policy. The same vaccine can also be used for 2 dose primary immunization and for booster dose vaccinations, making it truly an universal vaccine.

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