Adverse Events Following Immunization (AEFIs) for COVID-19 in Ontario: December 13, 2020 to September 11, 2022

Public Health Ontario This report provides a summary of adverse events following immunization (AEFIs) that are temporally associated (i.e., occur after receiving the vaccine) with receipt of COVID-19 vaccine and meet the provincial surveillance definitions (i.e., confirmed). It is important to note that AEFIs described in this report are defined as any untoward medical occurrences […]

Adverse Events Associated with Childhood Vaccines: Evidence Bearing on Causality

Institute of Medicine (US) Vaccine Safety Committee Childhood immunization is one of the major public health measures of the 20th century and is now receiving special attention from the Clinton administration. At the same time, some parents and health professionals are questioning the safety of vaccines because of the occurrence of rare adverse events after […]