In server cases permanent paralysis and even death may result. Rash begins on face and spreads over body. Most infectious once swelling starts. Headaches, some mild nervous system involvement are not uncommon. Occasionally, hearing loss may occur.
Mumps is likely to be more serious and painful in teenagers and adults than in children.
But a woman who catches it during early pregnancy is very likely to have a baby with serious birth defects. Outbreaks are also common among unvaccinated teenagers.