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HomeNewsPodcastCoronavirus Essential podcast | Health ministry warns against N95 mask use; data claims 18 crore Indians may be immune to COVID-19

Coronavirus Essential podcast | Health ministry warns against N95 mask use; data claims 18 crore Indians may be immune to COVID-19

Tune in to Coronavirus Essential podcast with Sakshi Batra for all the top news on the ongoing pandemic.

July 21, 2020 / 19:07 IST
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Dr Rajiv Garg, the Director-General of Health Services has warned states and union territories that N-95 masks with respiratory valves do not help prevent the spread of coronavirus. In a letter dated July 20, he urged the authorities to revisit the advisory on the use of home-made masks.

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Meanwhile, data from Thyrocare's antibody tests show Indians may already have immunity to COVID-19, as many have recovered without showing major symptoms. The data showed that nearly 15 percent of those tested had antibodies against SARS-Cov2, which causes COVID-19.

Tune in to Coronavirus Essential podcast with Sakshi Batra for all the top news on the ongoing pandemic.

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: Jul 21, 2020 07:07 pm

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