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astrazeneca vaccine: Pfizer, AstraZeneca Covid vaccines less effective against Delta variant: Oxford-led study - The Economic Times
Most Australians will get the AstraZeneca coronavirus vaccine, but priority groups will receive the Pfizer drug. What's the difference? - ABC News
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Study reveals Pfizer/BioNTech and Oxford/AstraZeneca COVID-19 vaccine efficacy and immune response in clinically vulnerable individuals
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