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HomeNewscoronavirusCoronavirus wrap June 15: Arvind Kejriwal says no lockdown in Delhi again; full-scale shutdown in Chennai from June 19 to 30

Coronavirus wrap June 15: Arvind Kejriwal says no lockdown in Delhi again; full-scale shutdown in Chennai from June 19 to 30

People coming to Karnataka from Chennai and Delhi will be put under 3-day institutional quarantine and 11-day home quarantine; and other news from India and around the world:

June 15, 2020 / 22:46 IST
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India on June 15 reported a total of 3,32,424 cases, according to the Ministry of Health and Family Welfare.

Of these, 1,53,106 are active cases, while 1,69,797 have recovered and have been discharged. The death toll stands at 9,520.

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Besides, the global tally inching closer to 8 million, with the United States alone reporting over 2 million cases.

Here are the key developments from today:

COVID-19 Vaccine
Frequently Asked Questions

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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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