SEASONAL SPREAD OF INFLUENZA AND PREVENTIVE MEASURES

Abstract: Seasonal influenza remains one of the most widespread acute respiratory viral infections and represents a significant public health challenge worldwide. The disease is characterized by recurrent seasonal epidemics, rapid person-to-person transmission, considerable morbidity, temporary disability, hospitalization, and mortality among vulnerable population groups. Influenza activity is strongly influenced by climatic conditions, population density, human behavior, school and workplace contacts, indoor crowding, host immunity, and the genetic variability of circulating influenza viruses. In temperate regions, influenza epidemics are usually observed during the colder months of the year, whereas in tropical and subtropical regions viral circulation may occur throughout the year with one or more periods of increased activity. The aim of this article is to analyze the major epidemiological features of the seasonal spread of influenza and to summarize effective preventive measures. A narrative review of current recommendations and scientific literature was conducted, with particular attention to World Health Organization and Centers for Disease Control and Prevention guidance. The findings demonstrate that annual influenza vaccination remains the principal preventive strategy. Additional measures, including respiratory hygiene, regular handwashing, adequate indoor ventilation, early isolation of symptomatic individuals, avoidance of close contact with infected persons, and epidemiological surveillance, play an important role in reducing influenza transmission. An integrated approach combining vaccination, individual protective behavior, infection-control measures, and public health surveillance is essential for reducing the seasonal burden of influenza.