The aim of current study was the investigation of complex treatment including nutritional supplement with recognized antioxidant and immunomodulatory properties (malic, glycyrrhizic, ascorbic and folic acids, glucosamine, arginine, glycine, calcium pantothenate, cyanocobalamine, zinc sulfate, pyridoxal) and purely plant systemic protease supplement (Serrapeptase, Bromelaim, Boswellia, Uncaria tomentosa, Quercetin) as a strategy against Covid 19. A clinical case of a 33-year-old patient treated in Internal Clinic Diseases ”Pirogov” against atypical bilaterally viral pneumonia with RT-PCR proven coronavirus have been presented. A complex treatment strategy was applied: Doxycycline, Amikacin sulfate, food additive containing malic and glycyrhizic acids, aminoacids, B-vitamins, antioxidants, proteolytic agent, Methylprednisolone, anticoagulant: Nadroparin calcium, hepatoprotector: Ademethionine. After 16 days hospitalization and two negative RT-PCR tests the patient was discharged in improved condition and home treatment with Levofloxacin hemihydrate, vitamins, probiotics, immunomodulatory and proteolytic products for one month was recommended. Immunostimulating, proteolytic and other products have an important role in complex treatment.