Background. As a consequence of the introduction of the MMR vaccine in 1980, an important decline of cases and outbreaks of mumps occurred. But at the beginning of the 21st century there has been an increase in outbreaks affecting well vaccinated cohorts of young people that disputes the effectiveness of the vaccine. This work describes an outbreak occurring in a highly-vaccinated population of young adults and the difficulties for its control. Methods: Descriptive study of the cases of mumps reported during the period bought between August 24, 2015 and May 12, 2016 in the region of Osona. Results: 162 cases with a median age of 21 years are reported (6- 56 age range). A positive correlation between the number of cases and the years gone by from the last dose of vaccine is described. Additional prevention and control measures are indicated. Conclusions: The results reinforce the need to continue vaccination schemes and the epidemiological surveillance of the disease in order to have high vaccine coverages and be able to promptly implement prevention and control measures. More studies are needed to monitor the effectiveness of a third dose to improve outbreak control.
Parotitis; Young people; Vaccination
Carol M, Torra R, Martínez A, Torner N, Jané M, Mosquera MM, et al. Brot de parotiditis en població de joves correctament vacunada. Butll Epidemiol Catalunya. 2018;39(09):197-204.
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