Retrospective analysis of tetanus in Puerto Rico (1967-68).
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011647:Puerto Rico; D012189:Retrospective Studies; D013742:Tetanus / Q000453:epidemiology* / Q000517:prevention & control