LeukinFeron is a combines preparation of natural cytokines involved in cellular reactions elimination of pathogen (antigen).Treatment with LeukinFeron results in a reduced frequency of side effects caused by prospidine therapy. Human LeukinFeron in the combined therapy of Kaposi's sarcoma leads to a considerable improvement of the initially abnormal levels of immunocompetent and phagocytizing cells. LF activates expression of HLA-Dr antigens on Human immune effectors and improve immune recognition.LF provides the normalizing action on CD4/CD8 cells interaction and cytokine production by immunocompetent cells that is important for immunoreactivity. LF is applied for the treatment of many viral diseases, bacterial infections, including sepsis, tuberculosis, chlamidial, mucoplasmic, herpetic infections and oncological diseases.