Interferon alfa

Interferon alfa (INN) or HuIFN-alpha-Le, trade name Multiferon, is a pharmaceutical drug composed of natural interferon alpha (IFN-α) obtained from the leukocyte fraction of human blood following induction with Sendai virus. Interferon alfa contains several naturally occurring IFN-α subtypes and is purified by affinity chromatography. Although the pharmaceutical product is often simply called "interferon alpha" or "IFN-α" like its endogenous counterpart, the product's INN is interferon alfa (the spelling of 'alfa' with 'f' reflects INN naming conventions).