This textbook is designed for medical students instructed in English in Medical Faculty — Sofia. It includes a great deal of the thematic units in social medicine according to the teaching plan. For solving practical tasks fresh illustrative material is used as well as a great number of tables, figures and charts. Data included in the manual gives options for analyzing information in comparative aspect between different countries and regions in the world. Sources of the data are the National Statistical Institute of Bulgaria, the World Health Organization, the United Nations and publications in the field of public health.