Declining incidence of Haemophilus meningitis in Kansas.
D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006193:Haemophilus influenzae; D006801:Humans; D015994:Incidence; D007223:Infant; D007615:Kansas / Q000453:epidemiology; D008297:Male; D008583:Meningitis, Haemophilus / Q000453:epidemiology*