Kristine M. Bisgard, Annie S. Kao, John Leake, Peter M. Strebel, Bradley A. Perkins, and Melinda Wharton
Figure 3. A. Average annual incidence of Hi invasive disease among persons of all ages, by county, United States, 1994 – 1995. B. Reported number of Hib invasive disease cases among children aged < 4 years, by county, United States, 1994 – 1995.