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.
Pharmacovigilance AE-Type Category Overview
Compare adverse-event category mixes across vaccines in a single pharmacovigilance system. Click a vaccine to open its summary page scrolled to that system’s panel.
Category assignment uses keyword matching on reported reaction terms — approximate, not official MedDRA SOC coding. Passive surveillance; does not establish causality. Cross-system counts are not directly comparable.
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