1 Polyribosylribitol phosphate (PRP) from Haemophilus influenzae type b as PRP-OMPC -7.5 µg Neisseria meningitidis OMPC (outer membrane protein complex of the B11 strain of Neisseria meningitidis subgroup B) Adsorbed hepatitis B surface antigen produced in recombinant yeast cells(Saccharomyces cerevisiae) - 5.0 µg