Figure. Race adjusted incidence rate* of Haemophilus influenzae type b and non-type b disease detected through laboratory-based surveillance+ among children aged <5 years--United States, 1989-1993.
*Per 100,000 children aged <5 years.
+The surveillance area population was 10.4 million in four states (three counties in the San Francisco Bay Area, eight counties in metropolitan Atlanta, four counties in Tennessee, and the state of Oklahoma).
Source: CDC. Progress toward elimination of Haemophilus influenzae type b disease among infants and children--United States, MMWR 1994;43:144-8.