| mumps outbreak among young people in northern ireland. | an outbreak of mumps occurred in the mid-ulster area of northern ireland between 1st november 1999 and 31st august 2000, with 729 cases notified. salivary test results were obtained for 430 (59%) reported cases, of which 332 (77%) were positive for mumps igm antibody. three hundred and sixteen (95.2%) of these confirmed cases were in the age range 9 to 19. one hundred and eighty-four (55.4%) confirmed cases had received one dose of mmr (measles, mumps and rubella) vaccine, but only 3 (0.9%) conf ... | 2001 | 12109401 |