What’s the efficacy of the Pfizer COVID-19 vaccine after 90 days?
What’s the efficacy of the Pfizer COVID-19 vaccine after 90 days?
Among adults who received 2 doses of the Pfizer-BioNTech (BNT162b2) mRNA COVID-19 vaccine, the risk for SARS-CoV-2 infection increased gradually after 90 days, according to results of a study published in BMJ. Dec 16, 2021
