Societal and health care provider Adverse Event Following Immunisation costs. a) per vaccinee and b) per adverse event from the literature and from our estimates for the Netherlands (NL), the United Kingdom (UK) and Canada (Can). Legend: * estimates are for all adverse events associated with measles-only vaccine ** estimates are for all adverse events associated with MMR vaccine *** Cost per vaccinee associated with the second dose of MMR only, the frequency of adverse event with the 2nd dose being assumed to be 10% those of the 1st dose. Shaded bars correspond to the health care provider costs. Full bars correspond to the societal costs.