A major new study has revealed how effective coronavirus vaccines are against the Delta variant. Scientists from the University of Oxford say the Pfizer COVID-19 vaccine has 85 per cent effectiveness against symptomatic infection two weeks after the second dose compared with AstraZeneca vaccine.
Coronavirus Digest J J Vaccine Effective Against Delta Variant News Dw 02 07 2021
This claim has been made in a study conducted under the guidance of researchers from Oxford University.

Astrazeneca vaccine effectiveness against delta. The COVID-19 vaccines from Pfizer and AstraZeneca are less effective against the delta variants of Corona than the alpha form of the corona virus. However the researchers said that the vaccines from Pfizer BioNTech and Oxford-AstraZeneca.
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