infectious diseases
Haemophilus influenzae Type b (Hib) Vaccine
Dose and Administration of Hib Vaccine
The Hib vaccine dose is 0.5 mL IM. A primary childhood series is given in 3 doses at age 2, 4, and 6 months or in 2 doses at age 2 and 4 months, depending on the formulation. In either case, a booster is recommended at age 12 to 15 months. One dose is given to older children, adolescents, and adults who have asplenia or who are scheduled for an elective splenectomy if they are unimmunized. Some experts suggest giving a dose before elective splenectomy regardless of vaccination history. The dose is given ≥ 14 days before elective splenectomy if possible. A 3-dose regimen is given 6 to 12 months after hematopoietic stem cell transplantation; doses are separated by ≥ 4 weeks. 