The low level of awareness among specialists about the need to vaccinate patients receiving immunosuppressive therapy increases the risk of infectious diseases among such patients. To solve this problem, a mobile application has been developed for vaccinating children on immunosuppressive therapy. The app provides up-to-date information for professionals, personalized vaccination schedules and automatic reminders to help increase awareness and ensure timely vaccinations, thereby reducing the risk of infectious diseases in immunocompromised children.