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Andhra Pradesh adds 349 COVID-19 cases, tally touches 8.81 lakh

The overall case mortality rate remained stable at 0.81 percent for some time now, against the national average of 1.45 percent.

December 27, 2020 / 07:13 PM IST

For the first time since May, a district in Andhra Pradesh reported zero cases of coronavirus even as a total of 349 were added afresh across the state in 24 hours ending 9 am on Sunday.

Vizianagaram achieved the distinction by not adding a single case in a day and incidentally, it was the last district in the state to join the COVID-19 chart on May 7.

Vizianagaram now has only 54 active coronavirus cases, the lowest in the state.

And, Chittoor district reported 105 fresh cases, the first district to cross the century mark in a day in close to three weeks.

The latest bulletin said 422 patients had recovered from the infection while two more succumbed in 24 hours.

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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 state COVID-19 table now showed a total of 8.81 lakh positives, 8,70,342 recoveries and 7,094 deaths, with 3,625 active cases.

In 28 days, Srikakulam and East Godavari districts did not report a single COVID-19 death, while Kurnool and Prakasam had one each.

Krishna had seen the highest number of 27 deaths in 28 days, followed by Guntur 14, Chittoor 13 and SPS Nellore 10.

Kadapa and West Godavari districts reported nine COVID-19 deaths each, Visakhapatnam eight, Anantapuramu seven and Vizianagaram three, according to government data.

The overall case mortality rate remained stable at 0.81 percent for some time now, against the national average of 1.45 percent.

The state completed 1.16 crore sample tests so far that turned out an overall infection positivity rate of 7.58 percent, while the recovery rate stood at 98.78 percent.

Follow our full coverage of the coronavirus pandemic here.
PTI
first published: Dec 27, 2020 07:13 pm

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