HomeNewsIndiaCovishield at Delhi govt vax centres to be reserved for 2nd dose only till July 31

Covishield at Delhi govt vax centres to be reserved for 2nd dose only till July 31

The order issued by the Directorate of Family Welfare said, all slots, booked online or availed through walk-in shall be reserved.

July 22, 2021 / 16:03 IST
A vial of the Oxford University-AstraZeneca COVID-19 vaccine, which is produced in India and marketed as Covishield (Representative image: Reuters)

On account of limited supply of Covid vaccine, the Delhi government on Thursday issued an order to reserve Covishield shots only for beneficiaries whose second dose is due, across all its vaccination centres till July 31.

The order issued by the Directorate of Family Welfare said, all slots, booked online or availed through walk-in shall be reserved.

"Vaccination of 18-44 cohort began on May 1, 2021 and with the completion of the 84-day interval for second dose of Covishield, many of them would now become eligible for the second dose in coming weeks," reads the order.

"In view of limited supply of vaccine, all slots, both for online booking and walk-in vaccination in the sessions being planned in government CVCs administering Covishield vaccine will be reserved for second dose of Covishield with immediate effect till July 31," it said.

Both Covishield and Covaxin vaccines are administered at Covid vaccination centres (CVCs) run by the city government.

COVID-19 Vaccine

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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.

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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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Over 95 lakh Covid vaccine doses have been administered in the national capital till July 21, according to a vaccination bulletin issued by the city health department on Wednesday.

The bulletin said Delhi had less than a day''s stock of vaccine doses left on Wednesday morning after administering over 71,000 doses on Tuesday.

The national capital had received 85,810 doses of Covishield on Tuesday, taking the total number of doses available in Delhi to 1,08,300.

The total number of Covaxin doses available stands at 1,84,390. Only 20 per cent of Covaxin stock can be used for the first dose, since its stock is limited and has irregular delivery cycles.

A total of 71,997 beneficiaries were vaccinated on Tuesday, including 29,857 who were inoculated with the second dose, thereby making them fully vaccinated.

PTI
first published: Jul 22, 2021 04:04 pm

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