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China reports 44 new virus deaths, lowest rise in new cases in over a month

The number of fatalities -- which is up from the 29 reported on Thursday -- were all in Hubei province, the epicentre of the outbreak, except for two deaths in Beijing.

February 28, 2020 / 08:32 AM IST

China reported 44 more deaths from the novel coronavirus epidemic on Friday and 327 fresh cases, the lowest daily figure for new infections in more than a month. The death toll now stands at 2,788 in mainland China, according to the National Health Commission.

The number of fatalities -- which is up from the 29 reported on Thursday -- were all in Hubei province, the epicentre of the outbreak, except for two deaths in Beijing.

In total, 78,824 people have now been infected with the COVID-19 strain in the mainland.

Friday's figure was the lowest rise in new cases since January 24, when 259 new infections were reported.

The general decline in new infections in China comes as infections in other countries gather pace, with the World Health Organisation warning that the coronavirus epidemic was at a "decisive point".

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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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Even China is now worried about importing cases and has ordered people arriving in Beijing from affected countries to go into a 14-day self-quarantine.
PTI
first published: Feb 28, 2020 08:26 am

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