HomeNewsWorldFresh COVID-19 outbreaks put millions under lockdown in China

Fresh COVID-19 outbreaks put millions under lockdown in China

Chinese health authorities reported more than 300 infections in the historic northern city of Xi'an -- home to the Terracotta Army -- and the country's biggest city Shanghai.

July 06, 2022 / 14:11 IST
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Tens of millions of people were under lockdown across China on Wednesday and businesses in a major tourist city were forced to close as fresh Covid clusters sparked fears of even wider restrictions.

Chinese health authorities reported more than 300 infections in the historic northern city of Xi'an -- home to the Terracotta Army -- and the country's biggest city Shanghai.

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The outbreaks and the official response have dashed hopes that China would move away from the kinds of strict virus curbs seen earlier this year, when its hardline zero-Covid policy saw tens of millions locked down for weeks on end.

In Shanghai, some people on social media reported receiving government food rations -- a throwback to the months-long confinement forced on the city's residents in the spring.

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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