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DCGI approves market authorisation for SII's Covid vaccine Covovax as heterologous booster dose

The DCGI's approval came following recommendation by the Subject Expert Committee of the Central Drugs Standard Control Organisation (CDSCO).

January 17, 2023 / 08:39 IST
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(Representative image: Reuters)

The Drug Controller General of India (DCGI) has approved market authorisation to COVID-19 vaccine Covovax as a heterologous booster dose for adults who have been administered two doses of Covishield or Covaxin, official sources said on Monday.

The DCGI's approval came following recommendation by the Subject Expert Committee of the Central Drugs Standard Control Organisation (CDSCO).

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Prakash Kumar Singh, Director of Government and Regulatory Affairs at the Serum Institute of India (SII), had recently written to the DCGI for the approval of Covovax heterologous booster dose for those aged 18 years and above in view of the escalating COVID-19 pandemic situation in some countries, an official source had said.

"The Subject Expert Committee of the CDSCO on Wednesday deliberated on the issue and had recommended for market authorisation of Covid jab Covovax as a heterologous booster dose for adults who have been administered two doses of Covishield or Covaxin," an official source said.

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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