HomeNewsIndia'Covidshield' vaccine trial participant alleges neuro breakdown, impaired cognitive functions

'Covidshield' vaccine trial participant alleges neuro breakdown, impaired cognitive functions

Alleging that the candidate vaccine was not safe, he has also sought cancelling approval for its testing, 'manufacture and distribution', failing which legal action would be taken.

November 30, 2020 / 17:30 IST
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A 40-year-old man who took part in the 'Covidshield' vaccine trial here has alleged serious side effects, including a virtual neurological breakdown and impairment of cognitive functions and has sought Rs 5 crore compensation in a legal notice to Serum Institute and others, besides seeking a halt to the trial.

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Alleging that the candidate vaccine was not safe, he has also sought cancelling approval for its testing, 'manufacture and distribution', failing which legal action would be taken.

The legal notice has been sent to Pune based Serum Institute of India (SII), which has collaborated with Oxford University and Astra Zeneca, a pharmaceutical company, in connection with making of the vaccine, 'Covidshield.'

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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