HomeNewsWorldShanghai tightens COVID lockdown on second day of curbs

Shanghai tightens COVID lockdown on second day of curbs

China's financial hub, home to 26 million people, is in its second day of a lockdown local authorities are carrying out by splitting the city roughly along the Huangpu River, dividing the historic centre from the eastern business and industrial district of Pudong to allow for staggered testing.

March 29, 2022 / 08:52 IST
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Traffic flows at the Nanpu Bridge in Shanghai, China. Photographer: Kevin Lee/Bloomberg
Traffic flows at the Nanpu Bridge in Shanghai, China. Photographer: Kevin Lee/Bloomberg

Shanghai, China's most populous city, on Tuesday again tightened the first phase of a two-stage COVID-19 lockdown, asking some residents to stay indoors unless they are getting tested as the number of daily cases rose beyond 4,400.

China's financial hub, home to 26 million people, is in its second day of a lockdown local authorities are carrying out by splitting the city roughly along the Huangpu River, dividing the historic centre from the eastern business and industrial district of Pudong to allow for staggered testing.

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While the Shanghai caseload remains modest by global standards - a record 4,381 asymptomatic cases and 96 symptomatic cases for March 28 - the city has become a testing ground for the country's "zero-COVID" strategy as it tries to bring the highly infectious Omicron variant under control.

Residents east of the Huangpu were initially locked down in housing compounds on Monday, but mostly allowed to roam around within. On Tuesday, however, two residents told Reuters they were informed by their neighbourhood committees they were no longer allowed to cross their doorsteps.

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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