HomeNewsIndiaIndia to tighten COVID-19 testing for tourists amid new variant concerns

India to tighten COVID-19 testing for tourists amid new variant concerns

The federal health ministry said reports of mutations in the new variant, identified as B.1.1.529, had "serious public health implications".

November 26, 2021 / 11:34 IST
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Representative image
Representative image

India issued an advisory to all states to rigorously test and screen international travellers from South Africa and other "at risk" countries amidst concerns over a new coronavirus variant, after easing some of its travel restrictions earlier this month.

The federal health ministry said reports of mutations in the new variant, identified as B.1.1.529, had "serious public health implications".

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"This variant is reported to have a significantly high number of mutations, and thus, has serious public health implications for the country in view of recently relaxed visa restrictions and opening up of international travel," health secretary Rajesh Bhushan said in a letter to states issued late on Thursday.

On Friday, the UK Health Security Agency said the new variant has a spike protein that was dramatically different to the one in the original coronavirus that COVID-19 vaccines are based on. And it could make existing vaccines less effective.

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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