Flu yesterday, today and tomorrow. The results of monitoring immunization and morbidity in the epidemic seasons 2019–2020, 2020–2021, 2021–2022, 2022–2023

• DOI: 10.17816/eid607411
• Publication Date: 2023-12-19T13:35:40Z
• Authors: Vladimir V. Nikif...; Roman V. Polibin; Tatiana G. Suranova; Natalia A. Polezh...
• Keywords: Influenza season

BACKGROUND: This study presents the epidemiological characteristics of influenza in last four seasons across years 2019–2023 The analysis vaccination and morbidity monitoring data have shown high effectiveness vaccine prophylaxis. vaccines registered Russia are considered, their features, composition, advantages indicated. Recommendations for use provided, including aspects persons belonging to risk groups.
 AIM: aimed analyze features 2019–2020, 2020–2021, 2021–2022, 2022–2023, evaluate domestic mass immunization Russian population.
 MATERIALS AND METHODS: Information from official website Research Institute Influenza Ministry Health Federation, state report “On State Sanitary Epidemiological Welfare Population Federation” 2021 2022, materials conferences congresses on influenza, information analytical certificates Federation were evaluated. Monitoring included rapid collection, analysis, synthesis (in different age, social, professional groups population), incidence, among others. Preventive was determined by following indicators: per 100,000 population, efficiency index (K) expressed conventional units (units), coefficient (protection) (E) %.
 RESULTS: COVID-19 pandemic had significantly affected quantitative seasonal epidemics. In 2020–2021 predominance SARS-CoV-2 virus resulted temporary “displacement” viruses human incidence decreased a historical minimum (0.07 population) 2020–2021. epidemic season activity noted with continued coverage against population (52.8%). rate 2022–2023 60.80 people. those vaccinated only 4.23 people, which confirms vaccination. etiological structure dominated A(H1N1)pdm09 virus. Of 149,000 cases (with laboratory confirmation, 136,600 cases), 3,276 people (2% number cases) vaccinated. Most patients concomitant diseases.
 CONCLUSIONS: post-pandemic period, background simultaneous circulation SARS-CoV-2, an increase morbidity, caused primarily A viruses, is expected. Seasonal strategy ensure protection influenza. Annual at least 40% all social remains effective reducing severe forms diseases mortality. Vaccination helps avoid hospitalization thus reduces burden healthcare system. Special attention should be paid pregnant, aged 60 chronic diseases.