HomeNewsWorldSome 50 countries start COVID-19 vaccinations

Some 50 countries start COVID-19 vaccinations

COVID-19 vaccine: India, Japan and Taiwan plan to begin vaccinations in the first quarter of 2021 and the Philippines and Pakistan in the second quarter.

January 01, 2021 / 12:07 IST
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File image: A ground staff walks past a container kept at the Cargo Terminal 2 of Delhi's Indira Gandhi International Airport, which according to the officials will be used as a COVID-19 vaccine handling and distribution center. (Image: Reuters/Anushree Fadnavis)
File image: A ground staff walks past a container kept at the Cargo Terminal 2 of Delhi's Indira Gandhi International Airport, which according to the officials will be used as a COVID-19 vaccine handling and distribution center. (Image: Reuters/Anushree Fadnavis)

Some 50 countries around the world have already started vaccinating their people against COVID-19, barely a year after the first alert by China signalled the start of the epidemic. A snapshot:

China leads the way

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China, where the pandemic first emerged, was also the first to start vaccinations over the summer, without waiting for a vaccine to be formally authorised but targeting the most vulnerable.

To date nearly five million Chinese people have been vaccinated. Beijing on Thursday granted "conditional" market approval to a Sinopharm vaccine with a reported 79 percent efficacy rate against Covid-19.

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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