Safety of the fourth COVID-19 BNT162b2 mRNA (second booster) vaccine: a prospective and retrospective cohort study

Prospective study (n=4,698) found 2nd booster induced significant changes in heart rate levels, with a peak day 2 and return to baseline by day 6. Retrospective study (n=250,000) found no association with 2nd booster and 25 events, incl no events of myocarditis or pericarditis.
Source: Current Awareness Service for Health (CASH) - Category: Consumer Health News Source Type: news