(Hib)

Selected conditions exist in which Haemophilus influenzae type b (Hib) conjugate vaccine may be used for adults. Hib vaccines are licensed for children 6 weeks to 71 months of age. No efficacy data is available on which to base a recommendation concerning the use of Hib vaccine for older children and adults with the chronic conditions associated with an increased risk for Hib disease. However, studies suggest that Hib vaccine may be beneficial in patients who have sickle cell disease, leukemia, or HIV infection, or have had splenectomies.