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Home Education

Covid Vaccines could fight against new Variants

by Web Desk
May 6, 2021
in Education, Health, New, World
Reading Time: 2 mins read
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Covid Vaccines
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A batch of new studies published Wednesday show how well coronavirus vaccines work against worrying new variants — and one indicates booster doses can help them work even better. At least one of the studies also demonstrated that being fully vaccinated matters.

The first nationwide study of coronavirus vaccination, done in Israel, showed Pfizer/BioNtech’s vaccine works far better after two doses.Two shots of the vaccine provided greater than 95% protection from infection, severe illness and death, Dr. Eric Haas of the Israel Ministry of Health and colleagues reported in the Lancet medical journal.

“Two doses of BNT162b2 are highly effective across all age groups in preventing symptomatic and asymptomatic SARS-CoV-2 infections and COVID-19-related hospitalizations, severe disease, and death, including those caused by the B.1.1.7 SARS-CoV-2 variant,” they wrote.

The B.1.1.7 variant, first seen in Britain, has spread widely and is now the most common new variant seen in the US.

It was also common in Israel when the study was done. The B.1.351 variant, first seen in South Africa, was also circulating in Israel, but had not caused many infections at the time of the study, so the researchers were unable to say how well the vaccine worked against that variant in particular.

With its small population, Israel was able to quickly vaccinate much of its population.The study found the Pfizer vaccine provided 95.3% protection against infection and 96.7% protection against death seven days after the second dose.

“By 14 days after vaccination, protections conferred by a second dose increased to 96.5% protection against infection, 98% against hospitalization, and 98.1% against death,” the team wrote.But people who got only one dose of the vaccine were far less protected. One dose alone gave just 57.7% protection against infection, 75.7% against hospitalization, and 77% against death.

“Topping up your immunity with the vaccine boost will be even more important with the emergence of new variants that might have acquired genetic changes that make them more resistant to the immunity generated by vaccines or following natural infection,” said Jonathan Ball, a professor of molecular virology at Britain’s University of Nottingham, who was not involved in the research.

Separately, a team in the Gulf state of Qatar looked at the efficacy of Pfizer’s vaccine in the population there when B.1.351 and B.1.1.7 were both circulating.They found reassuring results.”The estimated effectiveness of the vaccine against any documented infection with the B.1.1.7 variant was 89.5% at 14 or more days after the second dose. The effectiveness against any documented infection with the B

Tags: B.1.1.7COVID VariantCOVID-19COVID-19 VaccinePandemicSARS-CoV-2
Web Desk

Web Desk

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