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COVID-19 | Cases rise over 6-fold across country in last 8 days, sharp rise in positivity rate a concern: Health Ministry

The Health Ministry said that Omicron variant of COVID-19 was the predominant variant in cities reporting upsurge of cases. It said that the data needs to be analysed to see how badly the Omicron variant will affect the country in terms of hospitalisation

January 05, 2022 / 17:29 IST
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There has been a more than six times rise in COVID-19 cases across the country in last eight days, Union Health Ministry said on January 5 adding that Omicron variant was the predominant variant in cities reporting upsurge of cases.

The Ministry also said the data needs to be analysed to see how badly the Omicron variant will affect the country in terms of hospitalisation amid exponential rise in number of infections.

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“India has reported a more than 6.3 times increase in cases in the last eight days. A sharp increase seen in case positivity from 0.79 per cent on December 29, 2021 to 5.03 per cent on January 5,” Lav Agarwal, joint secretary in Ministry of Health said during a press conference on January 5.

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COVID-19 Vaccine
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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.

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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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