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.
What the Yellow Card scheme is
The MHRA Yellow Card scheme collects spontaneous reports of suspected adverse drug reactions in the UK, including vaccines. Public iDAP (interactive Drug Analysis Profiles) dashboards at yellowcard.mhra.gov.uk/idaps summarise reaction terms with downloadable CSVs.
Why searchers land here instead of the portal
The Yellow Card portal is the authoritative destination for UK reports — but many searchers want cross-vaccine category comparisons. This site mirrors MHRA-style data alongside VAERS, Lareb, and DAEN on our AE overview and per-vaccine pages.
Interpretation limits
Yellow Card reports are voluntary and unverified. Reporting rates cannot be converted to incidence without dose denominators. No public lot-level fields.
Related: Vaccine side effects index · Lot / batch lookup