One child in every 1,000 with measles may die of complications. Mumps is a disease caused by a virus, usually occurring in childhood. It causes fever, headache and inflammation of the salivary glands causing the cheeks to swell painfully. Sometimes mumps is more serious. This usually goes away without leaving permanent damage.
Mumps can also cause deafness.
About one out of every four men with mumps develops a painful inflammation and swelling of the testicles. One out of every 20 women develops inflammation of the ovaries. Both of these conditions are temporary and rarely result in permanent damage or sterility. It mainly affects children, but it may also affect adults. It is generally mild in young children.