evidence: According to a study, Fraiman J et al, Vaccine. 2022, mRNA COVID-19 vaccines were associated with an excess risk of serious adverse events, including coagulation disorders, acute cardiac injuries, Bell’s palsy, and encephalitis. This risk was 1 in 550 individuals, which is much higher than other vaccines. A second study, Sun CLF et al, Sci Rep. 2022, found increased acute cardiac arrests and other acute cardiac events following mRNA COVID-19 vaccination. [...] While the CDC has identified safety signals for stroke among individuals 65 and older following the bivalent booster administration, there is a need for additional assessments and research regarding safety of all mRNA COVID-19 vaccines.