Haemophilus influenzae type b in day care centers.
D002656:Child Day Care Centers / Q000706:statistics & numerical data*; D002675:Child, Preschool; D004812:Epidemiologic Methods; D006192:Haemophilus Infections / Q000453:epidemiology*; D006193:Haemophilus influenzae; D006801:Humans; D007223:Infant; D009518:New York