How to read database counts: Pharmacovigilance systems (VAERS, EudraVigilance, Yellow Card, VigiBase, Lareb, DAEN) collect spontaneous, unverified reports. A report is not a confirmed adverse event and does not prove the vaccine caused the outcome. Under-reporting, stimulated reporting, and missing denominators limit rate interpretation. Compare with trials and epidemiological studies on each page before drawing conclusions.
Three different "vaccine injury" meanings
- VAERS / pharmacovigilance reports — spontaneous filings, not verified causation (how to search)
- HRSA VICP — U.S. compensation program for petitioners who meet legal criteria; distinct from VAERS counts (hrsa.gov/vaccine-compensation)
- Published case reports — peer-reviewed temporal associations (case explorer)
Why this topic is surging
Interest in vaccine injury often follows high-profile reports or lot-specific concerns. Lot-level VAERS clustering is searchable on our batch dashboard — the feature most official portals lack.
What we will not claim
Raw report counts are not injury rates. We foreground under-reporting, over-reporting of coincidental events, and the absence of public lot denominators.
Related: Vaccine side effects index · Lot / batch lookup