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COVID-19 vaccination | Who will not receive the vaccine, what are the side-effects?

As India is on the cusp of its nationwide COVID-19 vaccination drive, here is everything you need to know about the Centre's guidelines on vaccine contraindications, possible side-effects, and administrative precautions.

January 16, 2021 / 08:27 IST
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The two vaccines that are currently being rolled out in India - Covishield and Covaxin - are safe.
The two vaccines that are currently being rolled out in India - Covishield and Covaxin - are safe.

In March 2020, the world was hit by the coronavirus. A year later, after the COVID-19 pandemic has taken the lives of nearly 1.5 lakh Indians, India is finally going to kick-start its vaccination drive.

Prime Minister Narendra Modi on January 16 at 10.30 am will inaugurate this nationwide drive via video conferencing. On the first day of the vaccination drive, over three lakh healthcare officials are set to be vaccinated. In Delhi alone, 8,000 workers will be vaccinated each day.

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Two vaccines have been granted emergency use approval in India - Covishield, developed by Oxford University and AstraZeneca and produced by Serum Institute of India, and COVAXIN, developed and produced in India by Bharath Biotech.

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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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