Mumps

Mumps is a highly contagious, vaccine-preventable viral disease caused by the mumps virus. Initial symptoms of mumps are non-specific and include fever, headache, malaise, muscle pain, and loss of appetite. These symptoms are usually followed by painful swelling around the side of the face, which is the most common symptom of a mumps infection. Symptoms typically occur 16 to 18 days after exposure to the virus. About one-third of people with a mumps infection do not have any symptoms (asymptomatic). Read more on Wikipedia