At what age is a booster dose for Hib recommended?

The recommendation for a booster dose of the Hib (Haemophilus influenzae type b) vaccine is typically at 12-15 months of age. This timing is crucial because it helps to ensure that children have adequate protection against Hib disease, which can lead to severe infections such as meningitis and pneumonia.

The Hib vaccine series usually consists of multiple doses given in early childhood, typically starting at 2 months of age. The booster dose at 12-15 months reinforces the immune response and helps maintain long-term immunity as the child grows. This age is selected because most children will have developed the capacity to mount a sufficient immune response to the booster at this stage, reducing the risk of Hib infection.

Other age options provided in the question do not align with the recommended schedule for the booster dose. For instance, doses given at 6-8 months would not be considered a booster, and while 18-24 months and 2 years are within the range of continued vaccination schedules, the specific recommendation for the Hib booster is firmly placed at 12-15 months. This timing helps ensure optimal efficacy of the vaccine and protects children effectively against potential infections.