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Coronavirus pandemic | Third COVID-19 case found in Mumbai's Dharavi

An official of the Brihanmumbai Municipal Corporation said a doctor who had a clinic on Dharavi's main road and who was also attached as a surgeon to a prominent private hospital tested positive for the virus. "The building where he lives will be quarantined and all high-risk contacts will be traced," the BMC official said.

April 03, 2020 / 07:41 AM IST
Representative image

Representative image

A 35-year-old doctor who has a clinic on the main road in Dharavi area of Mumbai tested positive for coronavirus on April 2, a civic official said.

This is a third COVID-19 case where the patient has a connection with Dharavi, considered to be Asia's biggest slum with a high population density.

An official of the Brihanmumbai Municipal Corporation said a doctor who had a clinic on Dharavi's main road and who was also attached as a surgeon to a prominent private hospital tested positive for the virus. "The building where he lives will be quarantined and all high-risk contacts will be traced," the BMC official said.

The doctor did not have any travel history, but further details were being probed, he added. On April 1, a 56-year-old garment shop owner living in a Slum Rehabilitation Authority building in Dharavi became the first person from the area to test positive for coronavirus. He died on the same evening.

On Thursday morning a municipal sweeper who lived in Worli but was posted at Dharavi tested positive.

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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 BMC has already created containment zones where these two cases were found and restricted the movement of over 2,500 persons in these areas.
PTI
first published: Apr 3, 2020 07:30 am

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