The doctor-therapist of Sumy branch of KhNUIA Nataliia Tereshchuk together with the doctor-epidemiologist of the State Institution "Territorial Medical Association of the Ministry of Internal Affairs of Ukraine in Sumy region" Oleksandr Petrenko conducted a binary lesson for cadets on coronavirus disease prevention. Oleksandr Volodymyrovych told about possible ways of infection with a virus and about the mechanism of a disease. He also spoke in detail about prevention, first of all, it is necessary to be more in the fresh air, strengthen the immune system, and ventilate living quarters more often. And, as a prerequisite, wear personal protective equipment and wash your hands regularly.