HomeNewsIndiaCovid vaccine production and availability: What we know so far

Covid vaccine production and availability: What we know so far

So far, 15.5 crore doses have been administered since January and the central and state governments along with the private sector aim to get 30 crore more doses in three months until July.

May 05, 2021 / 18:06 IST
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India is expected to receive more than 45 crore doses of vaccines by July, enough to fully vaccinate about a quarter of the country’s adult population with both the mandatory doses. Imported stocks of the Sputnik V vaccine and some under-development vaccines that may get approval soon will add to these numbers.

So far, 15.5 crore doses have been administered since January—when they were made available—and the central and state governments along with the private sector aim to get 30 crore more doses in three months until July. These estimates are based on the projected availability of stocks of Covishield (developed by Serum Institute of India and Covaxin (Bharat Biotech).

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This could mean significant coverage of people of 60+ age and health care and frontline workers with both doses by the end of July and accelerated coverage of the 45+ age group. The 18-44 age group can however expect only a modest vaccination coverage until July.

What Serum 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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