The introduction of Haemophilus influenzae type b immunization into the United Kingdom: practical steps to assure success.

Haemophilus influenzae type b (Hib) vaccine was introduced into the routine childhood immunization program in the UK in October, 1992. The implementation was coordinated on a national basis, taking account of market research of the information needs of both the public and health professionals. Vaccine distribution arrangements were linked to the scheduling of children for immunization, which was implemented through a national computerized system of calling children for immunization. All children commencing immunization were called for three doses of Hib vaccine. Children < 1 year of age were called back for three doses of vaccine; children >1 but <4 years were called for one dose. No boosters were given. National coverage from the outset of the campaign exceeded 90%; it is now 95% and the incidence of invasive Hib infection has declined by >95%. Some of the lessons learned from the UK introduction may be of relevance to other countries presently considering the implementation of Hib immunization into their routine immunization programs.