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197 new COVID-19 cases recorded in Delhi; positivity rate 0.34 percent

One more death was recorded on Sunday, taking the toll to 10,910, according to the latest health bulletin issued by the city government. From February 1-23, count of daily cases had been recorded below 200.

February 28, 2021 / 05:27 PM IST

Delhi recorded 197 new COVID-19 cases on Sunday, while one more fatality pushed the death toll to 10,910, according to data shared by the city health department. On preceding three days, the count of daily cases have stood at 200-mark or beyond.

On Friday, 256 COVID-19 cases were registered, the highest number of single-day incidences in February, while on Thursday and Wednesday the count stood at 220 and 200, respectively. On Sunday, Delhi recorded 197 fresh COVID-19 cases and a positivity rate of 0.34 per cent, authorities said, adding that the infection tally in the city has risen to 6,39,289.

One more death was recorded on Sunday, taking the toll to 10,910, according to the latest health bulletin issued by the city government. From February 1-23, count of daily cases had been recorded below 200.

Delhi had recorded 199 fresh COVID-19 cases on January 28. From January 15-26, the daily figures ranged from 148 on January 25 to 299 on January 16, according to official data.

On Thursday, no fatality was registered, the fourth time the single-day fatality count stood at zero this month. On February 9, 13 and 17 too, the death count was zero. On February 9, no fatality from coronavirus infection was registered in the national capital for the first time this month, and after a gap of nearly nine months.

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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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The 197 new cases on Sunday came out of the 57,772 testsconducted the previous day, according to the health bulletin. The total number of tests conducted the previous day included 39,070 RT-PCR tests and 18,702 rapid antigen tests, the bulletin said.

The tally of active cases on Sunday rose to 1,335 from 1,307 the previous day, according to the bulletin. The number of people under home isolation as on Sunday rose to 691 from 627 on Saturday, it said, adding over 6.27 lakh people have recovered.

Delhihad recorded 94 fresh COVID-19 cases on February 16, the lowest in over nine months. Delhi had recorded 96 coronavirus cases on January 27, that time the lowest in over nine months, and the first time the daily incidences count had stood below the 100-mark in that month.
PTI
first published: Feb 28, 2021 05:27 pm

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