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Explained | Why coronavirus’ Delta Plus variant is concerning

With the second wave of COVID-19 cases subsiding, most states are reopening and easing restrictions. This may lead to rapid transmission of the novel coronavirus' new Delta Plus variant

June 23, 2021 / 15:05 IST
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People shop at a crowded roadside vegetable market after authorities eased coronavirus restrictions, following a drop in COVID-19 cases in Ahmedabad, India on June 15, 2021 (Image: Reuters/Amit Dave)
People shop at a crowded roadside vegetable market after authorities eased coronavirus restrictions, following a drop in COVID-19 cases in Ahmedabad, India on June 15, 2021 (Image: Reuters/Amit Dave)

The Union Ministry of Health and Family Welfare (MoHFW) on June 22 designated the ‘Delta Plus’ variant of the novel coronavirus, a mutant of the ‘Delta’ variant, as a “variant of concern”.

The health ministry also advised three states – Maharashtra, Madhya Pradesh and Kerala – to immediately ramp up containment measures in districts where the variant has been found.

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Cases so far

A day earlier, Maharashtra had confirmed that 21 cases of people getting infected by the Delta Plus variant had been found in the state.

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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