Serious and Non-serious Hepatitis Reports in the U.S. Vaccine Adverse Event Reporting System, 1990–2026: A Cross-Sectional Analysis
Background Post-marketing surveillance monitors reports of adverse events following vaccination, including reports of hepatitis. The Vaccine Adverse Event Reporting System (VAERS) is a passive surveillance system that can describe reporting patterns but cannot establish incidence, risk, or causality. This study aimed t...