Mumps is a contagious illness caused by a virus that infects the salivary (parotid) glands, which are located between the ear and the jaw, and that sometimes infects other glands, particularly the testicles (orchitis). The glands become swollen and tender as a result of the virus.

Mumps can affect people of all ages, but it most commonly affects children between the ages of 5 and 19. Mumps is rare in babies younger than a year old, because they still have some protection against the virus from their mothers. It is a mild illness in children younger than 2.

Mumps is uncommon in adults because most adults have either had the illness as children or have been immunized with the measles, mumps, and rubella (MMR) vaccine. When adults do get the illness, symptoms may be more severe, and complications are more likely.

Last Updated: March 31, 2009

Author: Debby Golonka, MPH

Medical Review: Michael J. Sexton, MD - Pediatrics & Stanford T. Shulman, MD - Pediatrics

related physicians

related services

Bon Secours International| Sisters of Bon Secours USA| Bon Secours Health System

This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2010 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.