WHO advance team on way to China to set up probe into virus origin

The virus is believed to have emerged in a wholesale market in the central Chinese city of Wuhan late last year, since then closed, after jumping the species barrier from the animal kingdom to infect humans.

Reuters

July 10, 2020 / 18:11 IST

Myth 1: Mental illnesses are rare | On October 7, the World Health Organization said “close to one billion people globally have a mental disorder”. (Image: Reuters)

An advance team from the World Health Organization (WHO) has left for China to organise an investigation into the origins of the novel coronavirus which sparked the global pandemic, a spokeswoman said on Friday.

The virus is believed to have emerged in a wholesale market in the central Chinese city of Wuhan late last year, since then closed, after jumping the species barrier from the animal kingdom to infect humans.

The two WHO experts, specialists in animal health and epidemiology, will work with Chinese scientists to determine the scope and itinerary of the investigation, WHO spokeswoman Margaret Harris told a UN briefing in Geneva.

"They have gone, they are in the air now, they are the advance party that is to work out the scope," she said.

This would involve negotiations on issues including the composition of the fuller team and what skills were needed, she added.

COVID-19 Vaccine

Frequently Asked Questions

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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