The training manual provides up-to-date data on the etiology, epidemiology, pathogenesis, clinic, diagnosis, treatment and prevention of childhood infectious diseases. Included are issues of infectious exanthemas, respiratory infections and intestinal infections. Tonsil involvement in children, meningeal syndrome with differential diagnosis of meningitis are presented in detail. Of particular relevance are the issues of HIV infection and coronavirus infection COVID-19 in children. The manual is supplemented with color drawings and photographs.