Chemoprophylaxis for haemophilus influenzae type b.
D000367:Age Factors; D002675:Child, Preschool; D006192:Haemophilus Infections / Q000517:prevention & control*; D006193:Haemophilus influenzae; D006801:Humans; D007223:Infant; D012293:Rifampin / Q000627:therapeutic use; D012307:Risk Factors
D012293:Rifampin