AstraZeneca, Pfizer COVID-19 vaccines offer high protection 6 months after second dose: Study

The researchers used records on 1,951,866 (19.5 lakh) and 3,219,349 (32 lakh) adults who had received two doses of Pfizer and AstraZeneca vaccnes, respectively and 2,422,980 (24 lakh) unvaccinated adults.

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