BACKGROUND: In Sudan, neither mumps nor rubella vaccines are currently used and comprehensive data on the seroepidemiology of measles, mumps, and rubella M.M.R , as well as information about circulating mumps virus genotypes, are lacking. ...Phylogenetic analysis showed the presence of genotype C mumps virus for the first time in Sudan. CONCLUSIONS: The study findings provided new information on M.M.R epidemiology in Sudan, which may guide future control programmes in the country....