HomeNewsWorldAstraZeneca announces global withdrawal of COVID-19 vaccine amid demand crunch
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AstraZeneca announces global withdrawal of COVID-19 vaccine amid demand crunch

Additionally, AstraZeneca plans to revoke marketing authorizations for its vaccine, Vaxzevria, within Europe due to reduced demand

May 08, 2024 / 08:16 IST
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AstraZeneca cited an abundance of newer vaccine options available to be the reason behind the vaccine withdrawal

AstraZeneca announced on Tuesday that it is globally withdrawing its COVID-19 vaccine, as reported by UK-based media outlet The Telegraph. The company cited an abundance of newer vaccine options available since the pandemic began.

Additionally, AstraZeneca plans to revoke marketing authorizations for its vaccine, Vaxzevria, within Europe due to reduced demand and discontinuation of production and supply.

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"As multiple, variant COVID-19 vaccines have since been developed there is a surplus of available updated vaccines," the company said.

The withdrawal announcement comes at the heels of media reports suggesting that AstraZeneca has acknowledged in court documents that the vaccine can lead to side effects such as blood clots and low blood platelet counts.

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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