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How long does it take to build immunity after COVID-19 vaccination? It depends on the vaccine…

.. Summary (Effectiveness against infection)(1) Pfizer1st dose 52%After 14-21 days 92%2nd doseAfter 7 days 95%(2) Moderna1st doseAfter 14 days 92%2nd doseAfter 14 days 94%(3) AstraZeneca1st doseAfter 22-90 days 76%2nd dose (given 12 weeks later) 82%(4) Johnson & JohnsonSingle doseAfter 14 … Continue reading

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