title: [Peculiarities of present-day morbidity of influenza A (H1N1 swl)].
abstract: A rise in influenza morbidity became a topical problem again after the identification of a new H1N1 swl strain in California in 2009. In June 2009, WHO announced the onset of a new pandemic. We consider the epidemiological situation as regards respiratory viral diseases during recent years with special reference to influenza A (H1N1 swl). The literature data demonstrate the multifaceted clinical picture of this disease attributable to genetic variability of the virus and the immune response to infection. Most cases of influenza A (H1N1 swl) are either mild or severe diseases; it may be especially serious in previously unaffected young and middle-aged subjects and develop into acute respiratory distress syndrome with the fatal outcome. As a rule, the most severe cases are recorded in high-risk groups. Pathomorphological changes associated with pandemic influenza are described in comparison with those documented in earlier pandemics.
authors.forename: N O
authors.initials: NO
authors.lastname: Golokhvastova
mesh_terms: D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000472:pathogenicity*; D007251:Influenza, Human / Q000453:epidemiology / Q000401:mortality / Q000503:physiopathology / Q000821:virology