title: Measles and rubella: old problems in a new generation.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008457:Measles / Q000517:prevention & control*; D012306:Risk; D012409:Rubella / Q000517:prevention & control*