Biologics comprise a wide range of products such as vaccines, blood and blood components, antitoxins, allergenic products, diagnostic devices, somatic cells, gene therapy, and tissues. But the therapeutic proteins and antibodies listed below currently make up by far the largest part of the surging biologic drug market.

Therapeutic proteins are used to treat patients suffering from a growing variety of conditions, including various cancers, heart attacks, strokes, cystic fibrosis, Gaucher's disease, diabetes, anemia, and hemophilia. Here are some of the major classes of biologics.