Albert Benavides, data mining and signal detection, EudraVigilance, late and under-reporting, proportional reporting ratios, resources you can consult yourself, Surya Arby, the limitations of passive reporting systems, the question of informed consent, the Vaccines Adverse Events Reporting System(VAERS), the withholding of quality information by public agencies
Just follow the links, eh.
Hat tip: GKB Weber
Additional references (to be updated):
VAERS is the Vaccine Adverse Event Reporting System put in place in 1990. It is a voluntary reporting system that has been estimated to account for only 1% (see the Lazarus Report) of vaccine injuries. OpenVAERS is built from the HHS data available for download at vaers.hhs.gov.
The OpenVAERS Project allows browsing and searching of the reports without the need to compose an advanced search (more advanced searches can be done at medalerts.org or vaers.hhs.gov).