Effect of a complex system of controlling influenza on a citywide scale on the etiological structure of acute respiratory diseases

Materials on the etiological structure of acute respiratory diseases (ARD) and the spread of respiratory virus infection among the population of the city under the conditions of mass vaccinal prophylaxis and chemoprophylaxis are presented. These materials indicate that the proportion of influenza A virus in the etiological structure of ARD decreased by half as the result of introducing the complex system of influenza control in the city. The proportion of other causative agents of ARD before and after introducing the complex system of influenza control irregularly varied among different age groups of the population without statistical significance. The indices characterizing the spread of influenza A virus infection among the population of the whole city were found to be significantly decreased during the second period of observation.