HomeNewscoronavirusShanghai district orders mass COVID-19 testing, lockdown

Shanghai district orders mass COVID-19 testing, lockdown

Strict measures have been imposed across the country, from Shanghai in the east to Tibet far to the west, where anti-lockdown protests have also been reported.

October 28, 2022 / 11:55 IST
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(Image: Reuters)
(Image: Reuters)

=China’s largest city of Shanghai is ordering mass testing Friday on all 1.3 million residents of its downtown Yangpu district and confining them to their homes at least until results are known.

The demand is an echo of measures ordered over the summer that led to a two-month lockdown of the entire city of 25 million that devastated the local economy, prompting food shortages and rare confrontations between residents and the authorities.

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At the start of the lockdown, authorities said they would last just days but then kept extending the deadline.

China has shown no sign of backing away from its hardline “zero-COVID” policy since a major congress of the ruling Communist Party that concluded this week by awarding authoritarian leader Xi Jinping a third five-year term in power and packed top bodies with his loyalists.

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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