Mumps is a viral infection. The infection causes fever and swelling of the parotid glands. These glands are located on the side of the face, near the ear. Because of the mumps vaccine, this condition is not as common as it once was in the United States.

Swollen Parotid Gland
Swollen Parotid Gland
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The virus is usually spread through contact with an infected person's saliva. The mumps virus spreads easily among people in close contact.