Sera from different age cohorts in Belgium show limited cross-neutralisation between the mumps vaccine and outbreak strains, Vermeire, Tessa, Barbezange Cyril, Francart Aurélie, Hamouda Assia, Litzroth Amber, Hutse Veronik, Martens Lennart, Vandermarliere Elien, and Van Gucht Steven , Clinical Microbiology and Infection, 28/11/2018, (2018)