COVID-19 update | 366 fresh cases in Delhi, positivity rate rises to 3.95%

With this, Delhi's COVID-19 tally has increased to 18,67,572. The death toll stands at 26,158.

PTI

April 15, 2022 / 22:39 IST

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Delhi on Friday recorded 366 fresh COVID-19 cases and zero death, while the positivity rate rose further to 3.95 per cent, according to data shared by the city health department. With this, Delhi's COVID-19 tally has increased to 18,67,572. The death toll stands at 26,158, according to the bulletin.

The daily COVID-19 cases and the positivity rate in the national capital have seen an upward trend in the last few days. Delhi had on Thursday recorded 325 COVID-19 cases and zero death, while the positivity rate stood at 2.39 per cent.

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On Wednesday, 299 COVID-19 cases were recorded with a positivity rate of 2.49 per cent and no death. A total of 9,275 COVID-19 tests were conducted the previous day, the bulletin stated.

The number of daily COVID-19 cases in Delhi had touched the record high of 28,867 on January 13 this year during the third wave of the pandemic. The city had recorded a positivity rate of 30.6 per cent on January 14, the highest during the third wave of the pandemic which was largely driven by the highly transmissible Omicron variant of the coronavirus.

COVID-19 Vaccine

Frequently Asked Questions

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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