HomeNewsIndiaCOVID-19 variants first detected in India to be called 'Delta' and 'Kappa', says WHO

COVID-19 variants first detected in India to be called 'Delta' and 'Kappa', says WHO

Scientifically, the more infectious variant of coronavirus found first in India is referred to as B.1.617, also known as the "double mutant".

June 01, 2021 / 08:36 IST
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The 'double mutant' is considered to be responsible for India's second pandemic wave (Representative Image)
The 'double mutant' is considered to be responsible for India's second pandemic wave (Representative Image)

The World Health Organisation (WHO) on May 31 said that it will name coronavirus variants from different countries using Greek alphabets. Thus, two COVID-19 variants first detected in India has now been dubbed as 'Delta' and 'Kappa'.

Delta in particular, scientifically named B.1.617 or the "double mutant" variant is considered to be more infectious and thus likely responsible for the exponential surge in infections in India since mid-March. Kappa, scientifically known as the B.1.617.1 variant was found earlier in the country.

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"The labels don’t replace existing scientific names, which convey important scientific information and will continue to be used in research. No country should be stigmatised for detecting and reporting COVID-19 variants," WHO official Dr Maria Van Kerkhove added.

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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