Checking mumps status should be part of travel medical advice. Swiss recommendations: All persons born after 1963 who have no documented protection against the infection should be vaccinated twice with MMR vaccine. Due to the insufficient efficacy of the Rubini vaccine strain (contained in the previously administered vaccine Triviraten®), persons who have received this vaccine strain should receive additional MMR doses (i.e. 1 or 2 MMR doses, aiming for a total of 2 mumps-effective vaccine doses).