HomeNewscoronavirusBeijing warns of 'explosive' COVID outbreak, Shanghai conducts mass testing

Beijing warns of 'explosive' COVID outbreak, Shanghai conducts mass testing

Beijing only relaxed curbs less than two weeks ago that had been imposed to fight a major outbreak that began in April.

June 12, 2022 / 08:40 IST
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Representative Image (Source: AP)
Representative Image (Source: AP)

China's capital Beijing is experiencing an "explosive" COVID-19 outbreak connected to a bar, a government spokesman said on Saturday, as the commercial hub, Shanghai,conducted mass testing to contain a jump in cases tied to a hair salon.

The warning followed a new tightening of COVID curbs in Beijing since Thursday, with at least two districts closing some entertainment venues after a flare-up in a neighbourhood full of nightlife, shopping and embassies.

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While China's infection rate is low by global standards, it maintains a zero-COVID policy, citing the need to protect the elderly and the medical system, even as other countries try to live with the virus.

So far, the country of 1.4 billion has seen just 5,226 deaths from COVID-19.

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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