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Last Updated : Sep 24, 2020 07:01 PM IST | Source: Moneycontrol.com

Coronavirus Essential podcast | New interest for nasally administered vaccines; follow distancing even after vaccination, says expert

Sep 24, 6:33 PM Tune in to the Coronavirus Essential podcast with Sakshi Batra for all the news on the pandemic.

The intranasal vaccine, which is administered through nose, is gaining new interest after the Serum Institute of India announced that it will manufacture US-based Codagenix's COVID-19 vaccine candidate. On September 23, Bharat Biotech had announced a similar deal with Washington University School of Medicine.

Meanwhile, Dr Anthony Fauci has said that scientists should know by the end of the year if they have a safe and effective vaccine. However, he warned that people should continue using masks and follow social distancing norms even after vaccination.

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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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First Published on Sep 24, 2020 07:01 pm
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