September 16, 2021

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The effectiveness of the Pfizer and AstraZeneka vaccines is declining

The effectiveness of the Pfizer and AstraZeneka vaccines is declining

The effectiveness of the COVID-19 vaccine

British scientists analyzed (using polymerase chain reaction tests) samples from more than one million people who had received two doses of either Pfizer or AstraZeneca. during this period The protection offered by Pfizer’s setting decreased from 88 percent. In the first month of the study, the rate was up to 74 percent. Five or six months later. In case The effectiveness of the AstraZeneki vaccine decreased from 77%. up to 67 percent In a slightly shorter period of four to five months.

A study of more than 1 million Britons has found that the effectiveness of the Pfizer and AstraZeneca COVID-19 vaccines is declining.

BBC News quoted experts as fearing that the effectiveness of COVID-19 vaccines will continue to decline over time after it is administered. Especially since the most contagious delta variant is spreading. Thus, immune breakdown may occur more frequently in people who have been vaccinated against COVID-19.


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Do vaccinations protect against corona virus?

According to scientists, vaccinations are still a very good protection against this disease and death. Public Health England estimates that vaccinations that were once common in England saved 23 million people and 84,600 people from infection. redeemed from death.

The lead author of the study, A. Tim Spector says it explains why some people experience a breakdown in immunity to SARS-CoV-2 despite being vaccinated with two doses. – Protection will continue to decline, but this is not an argument for giving up vaccination – Confirms.

He notes that vaccines against COVID-19 continue to provide protection against infection in the majority of the population, including against the delta variant. “So there are still as many people as possible to be vaccinated,” he adds.

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According to a British specialist, the effectiveness of vaccination may drop to about 50%. This winter. However, other specialists advise caution in any of these predictions.

The third dose of the vaccine – who needs it?

According to the professor. Spector, a third dose of the vaccine may be helpful in some people. However, he notes that some people – despite being vaccinated – have contracted the coronavirus, which could lead to a result similar to a third booster dose of the vaccine.

“Be careful about this, and not just give everyone a third dose, which would be questionable and morally wasteful,” he explained.

British Government Vaccine Adviser Adam Finn – citing other studies – claims that COVID-19 vaccines maintain good protection against serious diseases as well as hospital treatment.

– However, we must carefully monitor whether, instead of mild forms of the disease, we do not have more serious cases, because then a third strengthening dose will be required – he said.

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