This article is from the Childhood Vaccinations FAQ, by Lynn Gazis-Sax lynng@alsirat.com with numerous contributions by others.
The Merck Manual describes it as "durable." The PDR says that all of
the antibody levels induced by MMR have been shown to last up to 11
years without substantial decline, and "continued surveillance will be
necessary to determine further duration of antibody persistance."
 
Continue to: