http://www.nejm.org/doi/full/10.1056/NEJMoa066092#t=articleResults
Antibody responses to mumps (Figure 1C), like those to measles, were long-lived (estimated half-life, 542 years; 95% CI, 90 to infinity) and showed no significant decrease (P=0.69).
http://www.who.int/biologicals/areas/vaccines/mmr/mumps/en/
Mumps is an acute disease of children and young adults, caused by a paramyxovirus of which there is only a single serotype.
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