Washington Post: Two doses of Pfizer and AstraZeneca coronavirus vaccines effective against delta variant, study says

Washington Post: Two doses of Pfizer and AstraZeneca coronavirus vaccines effective against delta variant, study says. “Two doses of the Pfizer-BioNTech vaccine offer 88 percent protection against symptomatic disease caused by the delta variant, compared to 94 percent against the alpha variant that was first discovered in Britain and became dominant across the globe earlier this year, the study said. A double dose of the Oxford-AstraZeneca vaccine was 67 percent effective against delta, according to the British researchers, down slightly from an efficacy rate of 75 percent against the alpha variant.”

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