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Kerala records 15,692 fresh COVID cases, 92 deaths

As many as 89,722 samples were tested in the last 24 hours, the release said.

September 20, 2021 / 07:36 PM IST

Kerala on Monday reported 15,692 fresh COVID-19 cases and 92 deaths, which took the caseload to 45,24,185 and fatalities to 23,683.

The number of people who recovered from the infection since Sunday was 22,223 which brought the total recoveries to 43,32,897 and the number of active cases to 1,67,008, an official press release said.

As many as 89,722 samples were tested in the last 24 hours, the release said.

Among the 14 districts, Thrissur recorded the highest cases with 2,504 followed by Ernakulam (1,720), Thiruvananthapuram (1,468), Kozhikode (1,428), Kottayam (1,396), Kollam (1,221), Malappuram (1,204), Palakkad (1,156) and Alappuzha (1,077). Of the new cases, 64 were health workers, 66 from outside the State and 14,875 infected through contact with the source of it not clear in 687 cases.

There are currently 4,96,103 people under surveillance in various districts, of whom 4,71,399 are in home or institutional quarantine and 24,704 in hospitals.

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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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PTI
first published: Sep 20, 2021 07:34 pm

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