How many Haemophilus influenzae type b (Hib) vaccines are required for a child as part of the immunization schedule?

A child requires a total of four doses of the Haemophilus influenzae type b (Hib) vaccine as part of the recommended immunization schedule. The Hib vaccine is typically administered in a series of doses, beginning between 2 to 6 months of age. The schedule usually includes doses at 2 months, 4 months, 6 months (depending on the specific brand of the vaccine), and a final booster dose administered between 12 to 15 months of age. This series ensures adequate immunity against Hib, which can cause serious bacterial infections, particularly in young children.

Each dose is crucial for building and maintaining the child's immunity over time, thus preventing Hib infections effectively. The immunization schedule is designed based on extensive research to provide the best protection, adhering to the recommendations by health authorities.