Progress toward eliminating Haemophilus influenzae type b disease among infants and children--United States, 1987-1997.

Describes the continued decline of reported Haemophilus influenzae type b (Hib) disease cases and underscores the need for investigation of Hi invasive disease cases. Information on the national surveillance made by several countries; Purpose of some state for conducting active laboratory-based surveillance in selected areas; Vaccination history of children with Hib invasive disease in 1996 and 1997.