“Likewise, fewer than 1% of vaccine adverse events are reported. Low reporting rates preclude or slow the identification of “problem” drugs and vaccines that endanger public health.”
*Lazarus, R., Klompas, M., & Bernstein, S. Electronic Support for Public Health – Vaccine Adverse Event Reporting System (ESP:VAERS) (Massachusetts) | AHRQ Digital Healthcare Research: Informing Improvement in Care Quality, Safety, and Efficiency. Digital.ahrq.gov. 30 September 2010. https://digital.ahrq.gov/ahrq-funded-projects/electronic-support-public-health-vaccine-adverse-event-reporting-system.