India saw a single-day rise of 46,617 new coronavirus infections, taking the tally of COVID-19 cases to 3,04,58,251, while the national recovery rate has crossed 97 per cent, according to the Union Health Ministry data updated on Friday.

The death toll due to COVID-19 rose to 4,00,312 with 853 daily fatalities.

The active cases have further declined to 5,09,637, comprising 1.67 per cent of the total infections, while the national COVID-19 recovery rate has improved to 97.01 per cent, the data updated at 8 am showed.

A net decline of 13,620 cases has been recorded in the total number of active COVID-19 cases in a span of 24 hours.

Also, 18,80,026 tests were conducted on Thursday, taking the total cumulative tests conducted so far for detection of COVID-19 in the country to 41,42,51,520, while the daily positivity rate was recorded at 2.48 per cent. It has been less than five per cent for 25 consecutive days, the ministry said.

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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Coronavirus Update: India records 46,617 new COVID-19 cases; national recovery rate crosses 97%

The death toll due to COVID-19 rose to 4,00,312 with 853 daily fatalities.

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