The disease is easier to prevent than to treat. Everyone knows this saying. Many infectious diseases can be prevented by vaccination. Everyone knows that. But as soon as it comes to vaccination, the population begins to have doubts. Although there is no alternative to vaccination. The master class on 03/29/2025 was devoted to the problems of organizing and conducting vaccination. One of the main problems of declining confidence in vaccination is the spread of myths on social media about serious complications after immunization. The vaccination calendar is constantly improving, new vaccines are being introduced, which requires training of medical personnel. Therefore, the master class allowed us to update the knowledge of medical workers of the SCE City Polyclinic No. 1.Ust-Kamenogorsk, so that they can confidently answer patients’ questions, explain the indications and contraindications to vaccination. When discussing the problems of vaccination, cases from the practice of doctors and quizzes were used. The master class was organized and conducted under the guidance of the head of the Department of GMP in Semey, NCJSC “SMU”, MD, Professor A.A. Dyusupova and the assistant of the department, pediatrician of the highest category, T.I. Terekhova.