Measles--Puerto Rico.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D008457:Measles / Q000453:epidemiology* / Q000517:prevention & control; D011647:Puerto Rico; D014611:Vaccination