Underreported Reactions Harvard Study: https://digital.ahrq.gov/ahrq-funded-projects/electronic-support-public-health-vaccine-adverse-event-reporting-system
digital.ahrq.gov
Electronic Support for Public Health - Vaccine Adverse Event Reporting System (ESP:VAERS) | Digital Healthcare Research
The project sought to create a generalizable system to facilitate detection and clinician reporting of vaccine adverse events and found that it is possible to automatically detect adverse events in defined ways, and to electronically report them.