In medicine, the term “biologic” refers to a wide range of medicinal products. These can include blood, blood components, vaccines, allergenics, recombinant therapeutic proteins, somatic cells, gene therapy, and tissues. Biologic agents may consist of cells or tissues, or they may be composed of proteins, carbohydrates, nucleic acids, or combinations thereof. These products may be extracted from a biological source, or they may be produced by biotechnology techniques. In contrast, medicinal products traditionally termed “drugs” are non-protein, organic, small-molecule substances that are generally chemically synthesized.