A brief survey of the present incidence of infectious diseases (by WHO) and new possibilities of their team study. Global significance of morbidity and mortality of some infections is stressed, namely those of malaria, tuberculosis, HIV infection, infantile diarrhoea, respiratory diseases. Alarming trends in age distribution of some diseases (87 % of HIVinfection affects young population between 15 to 19 years) or the significance of HIV infection in combination with tuberculosis in previous 10 years in Africa are pointed out. Serious appears the information on the pharmacoresistance of mycobacteria as well as the growing resistance of Plasmodium falciparum to chlorochin, namely in the regions of the Southeast Asia.

        Key words: infectious diseases, incidence, prevalence, research.