title: Absence of transmission of the D9 measles virus in the region of the Americas, November 2002 - May 2003.
mesh_terms: D000293:Adolescent; D000569:Americas / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008457:Measles / Q000517:prevention & control* / Q000635:transmission; D008458:Measles Vaccine / Q000627:therapeutic use; D008459:Measles virus
chemical_list: D008458:Measles Vaccine