Adverse Event (AE)

Any experience or abnormal finding that has taken place during the course of a research project and was harmful to the subject participating in the research, or increased the risks of harm from the research, or had an unfavorable impact on the risk/benefit ratio. The FDA also includes in its definition abnormal preclinical or laboratory findings which may not yet have resulted in direct harm to subjects (e.g., a bacteria is identified in a culture from the same batch of cells used to produce a vaccine which has been administered, even if no cases of infection have been reported). The event may or may not be caused by an intervention (e.g., headache following spinal tap, death from the underlying disease, car collision). Adverse Events also include psychological, social, emotional, and financial harms. See also Serious Adverse Event and Adverse Drug Reaction.