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COVID-19: Uttar Pradesh logs highest single-day rise of 30,596 cases, 129 more fatalities

With the 129 fresh fatalities, the death toll due to the viral disease stands at 9,830, the official said.

April 18, 2021 / 06:40 PM IST

Uttar Pradesh registered the highest single-day rise in COVID-19 cases as well as fatality count, with the disease claiming 129 more lives, while 30,596 fresh cases pushed its tally to 8,51,620.

Briefing reporters here, Additional Chief Secretary (Health) Amit Mohan Prasad said in the last 24 hours, 30,596 fresh COVID-19 cases were reported from the state, while 9,041 patients recovered from the disease.

A total of 6,50,333 COVID-19 patients have so far recovered from the disease in the state, he added. With the 129 fresh fatalities, the death toll due to the viral disease stands at 9,830, the official said.

The count of active COVID-19 patients in the state stands at 1,91,457, he added. Prasad also informed that over 3.82 crore samples have so far been tested for the viral disease in the state, including more than 2.36 lakh in the last 24 hours.

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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.

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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