Aim: The mumps outbreak in the Plzeň Region in 2011 was analysed retrospectively using the epidemiological, clinical, and laboratory data. Vaccine efficacy analysis was also conducted in various population groups.
Material And Methods: The routine procedure and standard form were used by the epidemiologists to collect data on the age, sex, place of residence, presence in collectivities, date of disease onset, type of complications and date of their onset, hospital admission, vaccination, and results of laboratory analyses.