The article “Immunizations: Current Recommendations” (September 1, 1997, page 865) contained an error. In the section on Haemophilus influenzae type b, the article states that “No similar preparation combining the acellular pertussis component in a preparation with H. influenzae type b vaccine is currently available.” In fact, Trihibit, which has been licensed since September 1996, offers in a kit a combination of one vial containing Haemophilus b tetanus toxoid conjugate and a second vial (or five single-dose vials) containing diphtheria and tetanus toxoids and acellular pertussis vaccine adsorbed. In addition, the text failed to mention ActHIB as one of the H. influenzae type b vaccines currently available.