AstraZeneca, Pfizer vaccines both effective against Delta COVID-19 variants-study

AstraZeneca, Pfizer vaccines effective against Delta COVID-19 variants-study COVID-19 vaccines made by AstraZeneca (AZN.L) and the Pfizer-BioNTech (PFE.N), (22UAy.DE) alliance remain broadly effective against Delta and Kappa variants of the COVID-19 causing virus, which were first identified in India, according to a scientific study, underpinning a continued push to deliver the shots. Ludwig Burger,Aishwarya Nair Reuters

June 22 (Reuters) - COVID-19 vaccines made by AstraZeneca (AZN.L) and the Pfizer-BioNTech (PFE.N), (22UAy.DE) alliance remain broadly effective against Delta and Kappa variants of the COVID-19 causing virus, which were first identified in India, according to a scientific study, underpinning a continued push to deliver the shots.

The study by Oxford University researchers, published in the journal Cell, investigated the ability of antibodies in the blood from people, who were vaccinated with the two-shot regimens, to neutralize the highly contagious Delta and Kappa variants, a statement said.

"There is no evidence of widespread escape suggesting that the current generation of vaccines will provide protection against the B.1.617 lineage," the paper said, referring to the Delta and Kappa variants by a commonly used code.

However, the concentration of neutralising antibodies in the blood was somewhat reduced, which may lead to some breakthrough infections, they cautioned.