If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
Mumps is an acute viral illness caused by a paramyxovirus. It is usually characterised by bilateral parotid swelling, although it may present with unilateral swelling. Parotitis may be preceded by several days of non-specific symptoms such as fever, headache, malaise, myalgias and anorexia. Asymptomatic mumps infection is common, particularly in children (Plotkin and Orenstein, 2004).