OMP and diphtheria: DTaP-IPV-Hib-HepB (Vaxelis, MSP Vaccine Company†) is a hexavalent, combined diphtheria and tetanus toxoids and acellular pertussis (DTaP), inactivated poliovirus (IPV), Hib conjugate, and hepatitis B (HepB) vaccine that contains PRP-OMP as the Hib component.