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Delhi records zero COVID-19 fatality, 45 new cases

On Thursday, 45 fresh cases were recorded as the positivity rate stood at 0.06 percent, according to the latest bulletin.

August 26, 2021 / 09:07 PM IST
Image Source: Reuters

Image Source: Reuters

No death due to COVID-19 was recorded in Delhi on Thursday, while the national capital reported 45 fresh cases with a positivity rate of 0.06 per cent, according to data shared by the city health department. This is the sixteenth time since the starting of the second wave of the pandemic in the national capital that zero fatality has been logged in a day.

On July 18, July 24, July 29, August 2, August 4, August 8, August 11, August 12, August 13, August 16, August 20, August 21, August 22, August 23 and August 24, too, no death due to COVID-19 was recorded, according to official data.

On March 2 this year, the national capital had reported zero death due to the virus. On that day, the number of single-day infections stood at 217 and the positivity rate was 0.33 per cent.

The second wave swept the city during April-May period.

On Thursday, 45 fresh cases were recorded as the positivity rate stood at 0.06 per cent, according to the latest bulletin.

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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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According to covid19India.org, a crowdsourced initiative that collects data on COVID-19 and vaccination in India, Delhi had recorded 17 cases on April 15, 2020.

On Wednesday, the city had registered 35 cases and one fatality, while the positivity rate stood at 0.05 per cent.

Follow our full coverage of the coronavirus pandemic here.
PTI
first published: Aug 26, 2021 09:05 pm
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