Final answer:
The Hib vaccine is administered to children at 2, 4, 6, and 12-15 months of age. By the age of 5, children typically develop immunity and no longer need the Hib vaccine.
Step-by-step explanation:
The Hib vaccine is recommended to prevent infections caused by Haemophilus influenzae Type b, including meningitis, which can have serious complications in children. Children generally receive the Hib vaccine at 2, 4, and 6 months of age, with a final booster dose at 12 to 15 months of age. Once children are beyond 5 years of age, they have typically developed immunity to this bacterium, and therefore, additional Hib vaccinations are not recommended past this age.