Interferon - factor non-specific antiviral immunity, which is formed in different cells in contact cells with different inductors (live and inactivated viruses, endotoxins and other). Interferon plays an important role in the pathogenesis of viral infections, disrupting education viruses. Interferon can be considered as antiviral antibiotic of a wide spectrum of action. Interferon is used for prophylaxis and treatment of influenza and other acute respiratory diseases and diseases of the eyes and skin of viral etiology.