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Last Updated : Sep 16, 2020 10:06 PM IST | Source: PTI

Over 30 vaccine candidates supported, 3 in advance trials, 4 in advanced pre-clinical stage: Govt

Union Minister of State for Home Nityanand Rai also told the Rajya Sabha that 13 clinical trials of repurposed drugs have been undertaken to build a portfolio of therapeutic options for COVID-19 patients.

PTI

The government on Wednesday said more than 30 vaccine candidates for coronavirus have been supported, and three of them are in advance stages of trials now, while four are in advanced pre-clinical development stage.

Union Minister of State for Home Nityanand Rai also told the Rajya Sabha that 13 clinical trials of repurposed drugs have been undertaken to build a portfolio of therapeutic options for COVID-19 patients.

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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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"More than 30 vaccine candidates have been supported which are in different stages of development, 3 candidates are in advanced stage of Phase I, II, III trials and more than 4 are in advanced pre-clinical development stage," he said.

Rai said a national expert group on vaccine administration for COVID-19 was constituted on August 7, under the NITI Aayog.

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First Published on Sep 16, 2020 02:00 pm
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