About the Data
Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Number of confirmed and probable U.S.-acquired cases of mumps
A case definition for confirmed and probable U.S.-acquired cases of mumps is available from CDC.
Although the measles-mumps-rubella (MMR) vaccine is very effective, protection against mumps is not complete. Two doses of measles-mumps-rubella (MMR) vaccine are 88% effective at protecting against mumps; one dose is 78% effective. Outbreaks can still occur in highly vaccinated U.S. communities, particularly in close-contact settings. In recent years, outbreaks have occurred in schools, colleges, and camps. High vaccination coverage helps limit the size, duration, and spread of mumps outbreaks.
Additional resources about the objective
- Centers for Disease Control and Prevention (CDC). Case definitions for infectious conditions under public health surveillance.