Epidemiological Analysis of the Incidence of Hemorrhagic Fever with Renal Syndrome and Tick-Borne Encephalitis in the Russian Federation

Relevance. Hemorrhagic fever with renal syndrome (HFRS) and tick-borne encephalitis (TBE) are the most common natural focal diseases of viral etiology in Russia. The medical and social significance of these two infections is determined by the extensive foci of their spread, high annual morbidity rates, and the presence of severe forms of the disease can lead to permanent disability and even death. Aim. To assess the current epidemiological situation of HFRS and TBE in the Russian Federation. Conclusions. Over 23 years (from 2000 to 2022), 164,582 cases of HFRS were identified in Russia with an average annual rate of 4.9 cases per 100 thousand population, as well as 71,579 cases of TBE with an average annual rate of 2.5 cases per 100 thousand population; 668 (0.4%) and 1136 (1.6%) deaths from HFRS and TBE, respectively; 4030 (2.5%) and 9414 (13%) children under the age of 14 years among patients with HFRS and TBE, respectively. The incidence of HFRS and TBE per 100 thousand population of Russia was higher among rural residents than among urban residents. Most cases of HFRS were registered in the autumn-winter period, and TBE – at the end of June – the first half of July. Of the 85 administrative regions of Russia, cases of HFRS and TBE are registered in 42, in 18 – only HFRS, in 13 – only TBE, and in 12 regions no clinically diagnosed cases of HFRS and TBE have been identified.