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Mumbai records 1,539 new COVID-19 cases, highest since October

According to the latest data from the civic body, five fatalities were reported in the city in the last 24 hours, raising the toll to 11,511.

March 10, 2021 / 10:35 PM IST
PTI

PTI

Mumbai on Wednesday recorded 1,539 new COVID-19 cases, the highest number of infections since October last year, an official from the Brihanmumbai Municipal Corporation said.

With this, the city's COVID-19 tally has reached 3,37,123, the official said.

According to the latest data from the civic body, five fatalities were reported in the city in the last 24 hours, raising the toll to 11,511. This is the first time since October 21, 2020 that Mumbai's single-day count has crossed the 1,500 mark.

As many as 21,615 samples were tested in the last 24- hours, taking the number of tests done so far to 34,75,744, the official said.

At least 888 patients were discharged from hospitals during the day, raising the number of recoveries to 3,13,346, he said. This leaves the city with 11,379 active cases, he said, adding that the average growth rate of infections in the city has increased to 0.32 per cent from 0.17 per cent on February 18.

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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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The average doubling rate has come down to 215 days from 417 days, he said. The city currently has 25 containment zones in slums and chawls, while 229 buildings have been sealed, he added.

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