title: Clinical study of diphtheria, pertussis and tetanus.
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004165:Diphtheria / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009747:Nutritional Physiological Phenomena; D012737:Sex Factors; D013742:Tetanus / Q000503:physiopathology*; D014917:Whooping Cough / Q000503:physiopathology*