In France, where all mumps vaccines produced and marketed contain the Urabe AM-9 vaccine strain, little was known about the incidence of these side effects although several surveillance systems exist. The capture-recapture method can be used to estimate the total number of cases of a disease when at least two independent data sources are available. The low number of cases recorded by either system makes it difficult to test the statistical independence of the two systems by the calculation of the correlation coefficient of the sensitivity of the systems after stratification. However, the stratified data by age, by sex, by geographical zone and by type of vaccine show that the totals after stratification are not very different from the crude total. 96422249 Murray MW, et al.
Mumps meningitis after measles, mumps, and rubella vaccination.
No abstract available. Immunisation Division, PHLS Communicable Disease Surveillance Centre, London. Cases were ascertained by obtaining vaccination records of children with aseptic meningitis diagnosed from cerebrospinal fluid samples submitted to Public Health Laboratories or discharged from hospital with a diagnosis of viral meningitis. Both methods identified vaccination 15-35 daysbefore onset as a significant risk factor and therefore indicative of a causal association. The study confirmed that the true risk was substantially higher than suggested by case reports from paediatricians, probably about 1 in 11,000 doses.