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

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

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COVID-19 vaccines made by AstraZeneca and the Pfizer-BioNTech 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.

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