Recombivax HB, Hepatitis B Vaccine (Recombinant) Adult Formula, 3 mL

Recombivax HB is a vaccine that provides immunization against Hepatitis B. It is injected intramuscularly. Recombivax HB is the first recombinant vaccine. Prior hepatitis B vaccines relied on viruses derived from human blood sources.

Recombinant pharmaceuticals are created by inserting genes from one species into a host species, often yeast or bacteria, where they do not naturally occur. The genes code for a desired product, and therefore the genetically modified host organisms can be grown and used as a kind of living factory to produce the product. In this case, genes coding for the hepatitus B virus's surface antigen are inserted into yeast. Yeast produce the hepatitis B surface antigens, which are harvested and used as the active ingredient in Recombivax HB. Surface antigens are the part of the hepatitis B virus that the body recognizes to create an immune response. After being exposed to the antigen, the body learns to identify and respond quickly to the presence of hepatitis B and can successfully ward off future possible infections.

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