Importance Safety surveillance of vaccines against COVID-19 is critical to ensure safety,
maintain trust, and inform policy. Objectives To monitor 23 serious outcomes weekly, using
comprehensive health records on a diverse population. Design, Setting, and Participants
This study represents an interim analysis of safety surveillance data from Vaccine Safety
Datalink. The 10 162 227 vaccine-eligible members of 8 participating US health plans were
monitored with administrative data updated weekly and supplemented with medical record …