Аннотация:The present publication is devoted to the comparative eidemiogical and ethyologic analysis of flu in seasons of 2009-2010, 2011 and 2013. In the article there are presented quantitative data on hospitalization of patients to an infectious hospital in the period of epidemic seasons with the analysis of calendar time, duration and peaks of mass admission. Data on etiological structure offlu are provided for each epidemic season also. The lethality from flu as a whole and from flu A(H1)pdm09 is analyzed. Similarities and distinctions of epidemic seasons in the specified years are clarified.
