De aktive stoffer i Procomvax er polyribosylribitolphosphat (PRP) oprenset fra Haemophilus influenzae, der er kemisk bundet til ydermembran proteinkomplekset (OMPC) af Neisseria meningitidis og til hepatitis B overfladeantigenet (HBsAg) af hepatitis B - virusset, som er fremstillet på basis af en rekombinant gærstamme.
The active substances of Procomvax consist of polyribosylribitol phosphate (PRP) purified from Haemophilus influenzae and chemically coupled to the outer membrane protein complex (OMPC) of Neisseria meningitidis, and the hepatitis B surface antigen (HBsAg) of the hepatitis B virus, derived from a recombinant strain of yeast.