For example, insufficient childhood mumpsvaccination coverage (below 80%) may result in an undesirable epidemiological shift in the incidence of mumps to older age groups.
Parotitis and aseptic meningitis have been described as complications of mumpsvaccination with Urabe, Leningrad–Zagreb and Leningrad-3 strains of the vaccine but not with the Jeryl–Lynn strain1.
Currently 102 (53%) of 192 WHO member states include mumps in their routine childhood vaccination programmes, mostly as the combined measles-mumps-rubella (MMR) vaccine.