What is the Hib vaccine schedule for children who have fallen behind or are completely unvaccinated?

Healthcare providers should refer to the catch-up schedule published as part of the CDC Recommended Child and Adolescent Immunization Schedule (available at www.cdc.gov/vaccines/hcp/imz-schedules/child-adolescent-catch-up.html). The catch-up schedule will help determine the number of additional doses needed and the minimum intervals between doses. However, if a healthy child receives a single dose of Hib vaccine at age 15 months or older, he or she does not need any further doses regardless of the number of doses received before age 15 months. Some high-risk children between the age of 15 months and 59 months will be recommended for two doses of Hib vaccine based on previous history of incomplete vaccination; these special situations are reviewed in the Hib notes section of the schedule: www.cdc.gov/vaccines/hcp/imz-schedules/child-adolescent-notes.html.