Adverse events are unintended and harmful occurrences that happen during medical treatment or clinical trials. These events can include side effects from medications, complications from surgeries, or unexpected reactions to therapies. Monitoring and reporting adverse events is crucial for ensuring patient safety and improving healthcare practices. Healthcare professionals and researchers use data on adverse events to identify patterns and assess the risks associated with specific treatments. This information helps in making informed decisions about patient care and contributes to the overall understanding of the safety and effectiveness of medical interventions, including those involving drugs, vaccines, and medical devices.