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WHO hopes to have 500 million vaccine doses via COVAX scheme in first quarter of 2021: Chief scientist Soumya Swaminathan

To date 189 countries have joined the COVAX programme, which is backed by the WHO and seeks to ensure equitable distribution of vaccines. The United States is not among them, having secured bilateral deals.

December 05, 2020 / 11:32 IST
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WHO scientist says trial suspension a 'wake up call': The World Health Organization's chief scientist Soumya Swaminathan said the agency isn't overly worried about the pause in the clinical trials for a coronavirus vaccine developed by Oxford University and AstraZeneca and that the suspension of trial is a wake-up call to the global community to realize there are ups and downs in research.

The World Health Organization hopes to have half a billion doses of COVID-19 vaccines available for distribution by the global COVAX initiative in the first quarter of 2021, its chief scientist said on Friday.

To date 189 countries have joined the COVAX programme, which is backed by the WHO and seeks to ensure equitable distribution of vaccines. The United States is not among them, having secured bilateral deals.

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The initial COVAX plan is to vaccinate the 20 percent of populations at highest risk, including health workers and people aged over 65.

"The goal is to get at least 2 billion doses by end of 2021 which will be enough to vaccinate 20 percent of the populations of countries that are part of COVAX," chief scientist Soumya Swaminathan told a Geneva news conference.

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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