Seroepidemiological study to determine age for measles vaccination.
D000367:Age Factors; D002675:Child, Preschool; D006801:Humans; D007112:Immunity, Maternally-Acquired; D007115:Immunization Schedule; D007223:Infant; D008457:Measles / Q000517:prevention & control*; D008458:Measles Vaccine / Q000276:immunology*
D008458:Measles Vaccine