The development of modern methods of epidemiological control, on the one hand, and the creation of modern methods of diagnosis, prevention, and treatment, which will be available to all strata of society, on the other hand, is the key to preventing the pandemic spread of influenza in the world. Today, influenza is a serious threat to human health globally, which covers all countries of the world. Thus, according to the World Health Organization estimates, about 1 billion cases of influenza are registered annually worldwide, of which 3–5 million are severe cases and 290,000–650,000 are cases of death due to severe complications of respiratory dysfunction caused by influenza. Children are more susceptible to acute respiratory viral infections and influenza in the general population due to the physiological instability of the immune system, being mostly in crowded places and in large social groups (kindergartens, schools, entertainment centers), which increases the probability of infection. The risk group consists of patients with chronic pathology, particularly affecting the heart and lungs, who have problems with the immune system.