Although there is some conflicting information on the effect of breastfeeding on infants' antibody response to Haemophilus influenzae type b vaccines, there is no evidence that breastfeeding reduces protection against the disease. The Centers for Disease Control and Prevention and several health professional organizations state that vaccines given to a nursing mother do not affect the safety of breastfeeding for mothers or infants and that breastfeeding is not a contraindication to the Haemophilus influenzae vaccine.[1-3]
Breastfeeding alone appears to increase antibodies against Haemophilus influenzae and reduce the incidence of Haemophilus influenzae type b meningitis.[4-6] Breastfeeding also appears to reduce infant side effects associated with routine childhood immunization. Breastfed infants should be vaccinated according to the routine recommended schedules.