The committee does want to emphasize many of the adverse events examined are exceedingly rare in the population overall, and in most instances any particular adverse event, be it arthritis, meningitis, or any of the other vaccine–adverse events that the committee considered, are not preceded by immunization.Stratton, K.; Ford, A.; Rusch, E.; Clayton, E.W. (eds.) (2012): Adverse Effects of Vaccines. Evidence and Causality, National Academies Press, p. 633