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Mixing Pfizer, AstraZeneca doses provides strong immune response against COVID-19: study

Woodbine Racetrack Covid Vaccine Clinic

Mixing doses of the Pfizer-BioNTech and AstraZeneca-Oxford vaccines generate a stronger immune response than having two rounds of the AstraZeneca shot, new U.K. research suggests, though the highest antibody response was seen in people being fully vaccinated with Pfizer.

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