Background: The computer apparatus for electro-acupuncture diagnostics and medicated testing "IMEDIS-EXPERT" made in Russia was used for the purposes of this work to detect SARS-CoV-2 (COVID-19) or to prove its absence, and to select homoeopathic preparations, nosodes, and their relevant doses. The methods of the system-nosological approach (SNA) were used for the therapy of patients, which included recording and appliance of relevant control signals (C.S.) of homoeopathic preparations, both native and informational (electronic) copies. Aims: 1. Develop an algorithm to select preparations from the group of nosodes and homoeopathy to prevent the development of SARS-CoV-2 (COVID-19); 2. Evaluate the possibility of preventing treatment and therapy of coronavirus infection employing an "electronic vaccine" produced employing coronavirus C.S. Methodology: The electronic preventing "immunization" was made for patients as the preventing treatment of COVID-19, which was an adaptation to coronavirus C.S. conducted in accordance with a special algorithm. The three-block scheme of SNA therapy was used for the therapy of ill patients, which was composed of three preparations, which were used sequentially: 1. Control signal of coronavirus targeted on a patient's CMH; 2. Cerebral response (C.R.) with a patient's cumulative impact of: C.S. of coronavirus and the sum of target organs (blood-forming system, lymphatic systems, lungs, bronchus, gastrointestinal system) and test-indicators of immune regulation targeted on the second CMH marker amplification; 3. Drainages in the form of homeopathic preparations were used (after the impact of two previous preparations), which were: Arsenicum, Arsenicum iod, Carbo vegetabilis, Spongia, Drosera, Naya, Rhus Toxicodendron, and Ferrum met. The preparations were selected to compensate the third impact of CMH. Results: At present, 175 people have asked for help due to COVID-19, an electronic preventing vaccine ("immunization") made for 112 people on the SNA algorithm. According to the diagnostic testing results made for 63 ill patients and who asked for treatment: 47 people tested coronavirus infection, 16 people tested ARVI, and 12 people tested pneumonia caused by a virus. The coincidence of VRT tests (vegetative resonance tests) and PCR was found ranged from 68 to 75%. 4 people got ill by coronavirus among those who got preventing immunization (112 people) by "the electronic sensibilization method" (that was proved by VRT and PCR tests). The illness had the light form among 2 of them, and two people had moderate severity of illness without hospital admission. Conclusion: An algorithm is developed, which allows to select C.S. of therapeutic nosodes and homoeopathic preparations to prevent the development of SARS-CoV-2. The efficiency of applying the electronic immunization method according to the algorithms of SNA using coronavirus C.S. is 95%.