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Pfizer, AZ Vaccines Effective Against Delta After 2 Doses: Study

Editor’s note: Find the latest COVID-19 news and guidance in Medscape’s Coronavirus Resource Center. The Pfizer-BioNTech and AstraZeneca vaccines — the primary vaccine options in the United Kingdom — were less effective against symptomatic COVID-19 when people were exposed to the Delta variant of SARS-CoV-2 compared with the Alpha variant (known […]

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