INFLUENZA AND ACUTE VIRAL RESPIRATORY DISEASES INCIDENCE IN YAKUTSK CITY DURING 2015-2016, 2016-2017 AND 2017-2018 EPIDEMIC SEASONS

Abstract

Epidemiological situation concerning influenza and acute viral respiratory diseases in Republic Sakha (Yakutia) was analyzed during the 2015–2016, 2016–2017 and 2017–2018 epidemic seasons. The start of epidemic process of influenza and acute viral respiratory diseases seasonal incidence in Yakutsk city in 2015-2016 started simultaneously with elevation of incidence in the republic. During the 2016-2017 and 2017-2018 epidemic seasons incidence initially grew in Yakutsk city, the population of Yakutia regions was involved with a delay of two weeks. During the epidemic 70% of Yakutsk city citizens were infected. Should be noted that in Yakutsk resides a third part of the region population. Dynamics of epidemic process in Yakutsk city was similar to the one in republic in general; however, there are some differences such as single-wave course during the 2015-2016 epidemic season, shorter epidemic elevation period and lower percent of pupils in incidence age structure in comparison to republican indices during all three observed seasons.