is a vaccine indicated for active immunization against diphtheria, tetanus, pertussis, π½πΌπΉπΆπΌπΊππ²πΉπΆππΆπ and invasive disease due to Haemophilus influenzae type b. Pentacel is approved for use as a four dose series in children 6 weeks through 4 years of age (prior to 5th birthday).