Influenza is a seasonal infectious disease, the complications of which can significantly affect the deterioration of our body's health and can be far-reaching in time. The difficulty in treatment lies in the ability of the virus to undergo numerous transformations, hence the need for an annual comprehensive review of the predominant strains and modification of the composition of vaccines, which are currently the most effective method of combating the virus - prophylaxis. Infection occurs mainly by the droplet route, but contact with an infected surface is not excluded.