The mumps are caused by a virus which is spread from person-to-person by respiratory droplets or direct contact with articles that have been contaminated with infected saliva.
The parotid glands (the salivary glands between the ear and the jaw) are often swollen. Unvaccinated children between the ages of 2 and 12 are most commonly infected, but the infection can occur in other age groups.
Other organs may be involved, including the testes, the central nervous system, and the pancreas. The incubation period is usually 12 to 24 days.
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