This article is from the Childhood Vaccinations FAQ, by Lynn Gazis-Sax email@example.com with numerous contributions by others.
The Merck Manual describes it as "durable." "Mumps immunization
provides protection through the blood serum antibodies for at least 12
years, and possibly much longer." (Pantell, Fries, and Vickery) (See
also Q3c.4 for the PDR's description of the duration of all the