The study was carried out to investigate intro-cellular concentration of factors of antiviral defense of cells of whole blood of re-convalescents of community-acquired pneumonia and healthy individuals under effect of low intensity SHF-radiation of whole blood in vitro with frequency of 1000 MGz. The technique of enzyme-linked immunosorbent assay was applied for analyzing lysates of mononuclears of whole blood exposed to impact of low intensity SHF-radiation with frequency of1000 MGz on concentration of mitochondrial antiviral signal protein MAVS, RIG-I-like receptor type III - helicase LGP2, RIG-I-like receptor - helicaseMDA5, trans-membrane protein 173 (Tmem 173), interferon-regulated factors (IRF) 3,7 and 8, sub-units p50 and p65 of nuclear factor of transcription NF-kB, phosphorylated on serine in position form 32 of inhibitor of nuclear factor of transcription (IkB-a) and also its total concentration. Besides, spontaneous production of interferon - a/β by cells of whole blood was evaluated in cellular supernatant. The capacity of single 20 minutes of SHF-radiation effect to increase intracellular level of important regulative proteins, primarily MDA5, during the phase of convalescence of community-acquired pneumonia was established. Besides, radiation stimulates increasing of intracellular level of MAVS and Tmem173. The capacity of radiation was established to increase phosphorylation of inhibitor of nuclear factor NF-kB and level of components p50 and p65 of NF-kB. The capacity of SHF-radiation effecting production of interferon-β by cells of hole blood is demonstrated. In healthy individuals, radiation contributes into decreasing of intercellular content of MAVS in more degree as compared with levels of MDA5 and Tmem173. At that, radiation of culture of cells of whole blood stimulates increasing of production of interferons.