Real koumiss is a product of complex fermentation, which results in the formation of many biologically active substances, which matures in a bottle without GMOs, dyes and preservatives. Koumiss is a healthy product with centuries-old traditions. Natural product of mixed lactic acid fermentation of milk and special microorganisms of koumiss sourdough. It has high nutritional and antibiotic properties. It has a negative effect on the growth of tubercle bacillus, typhoid fever, dysentery. Favorably affects the work of the gastrointestinal tract, cardiovascular system, removes radioactive substances, calms the nervous system, normalizes sleep, relieves fatigue, quenches thirst and reduces hangover, has a beneficial effect on male potency, strengthens the immune system. Koumiss has healing properties for diseases of the upper respiratory tract and immunodeficiency, so doctors advise using koumiss for prevention during the period of illness and for those who have recovered from COVID-19. This drink will help recovered patients to recover, and those who were not sick to maintain their immunity at the proper level. Koumiss will help citizens who have recovered from pneumonia to rehabilitate their respiratory organs.