HomeNewsIndiaCOVID-19: Serum Institute to begin Covovax vaccine's phase 3 trial by mid-May

COVID-19: Serum Institute to begin Covovax vaccine's phase 3 trial by mid-May

The ICMR and SII are jointly performing a phase-2/3 observer-blind, randomised, controlled study to determine the safety and efficacy of the Covovax vaccine.

May 04, 2021 / 15:45 IST
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The COVID-19 vaccination drive in India commenced on January 16. (Image: AP)
The COVID-19 vaccination drive in India commenced on January 16. (Image: AP)

Serum Institute's second COVID-19 vaccine, Covovax, is likely to go into phase-3 trial later this month. Serum Institute has partnered with Novavax to develop the second coronavirus vaccine.

The Data Safety Monitoring Board has reviewed the safety data of the phase-2 trial, which comprised of 200 participants, and has given its recommendation, the Indian Express reported.

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The Drugs Controller General of India (DGCI) has also given its approval for the phase-3 trial, the report said.

COVID-19 Vaccine
Frequently Asked Questions

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How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

How many types of vaccines are there?

There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.
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