HomeNewsWorldChina's coronavirus cases drop to single-digit; private firms launch COVID-19 test services

China's coronavirus cases drop to single-digit; private firms launch COVID-19 test services

The overall death toll in the country remained at 4,632, with no death reported on Thursday.

April 24, 2020 / 12:03 IST
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China's confirmed coronavirus cases dropped to single-digit, while technology giants like Alibaba and Tencent have launched booking services for COVID-19 tests.

China's National Health Commission (NHC) on Friday said six new confirmed coronavirus cases -- two imported and four domestically transmitted -- were reported in the country on Thursday.

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As of Thursday, China reported a total of 1,618 imported cases, including 32 in critical condition, and 34 new asymptomatic cases, including one from abroad.

Asymptomatic cases refer to people who are tested COVID-19 positive but develop no symptoms such as fever, cough or sore throat. However, they pose a risk of spreading the disease to others.

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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