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Analysis of mortality and lethality rates due to influenza, acute respiratory disease (ARD), and acute pneumonia in adults has revealed a higher proportion in an old-age group (over 60 years) than in younger-age ones (15-30-year olds). Moreover, these figures have been found to have increased twice in the old-age group in the last two decades. At the same time the lethality rates due to acute pneumonia have been reported to be 8-12 times higher in inpatients over 60 years of age (a high-risk group) than those in younger adults and 3-4 times higher than those in the middle-age group. The extremely severe course of pneumonia-associated influenza characterized by toxicosis, pulmonary and cardiovascular insufficiency has been observed in most death victims.
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Iu G Ivannikov
April 1978,
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V A Isakov, and
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January 1975,
Zdravookhranenie Kirgizii,
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Vestnik Rossiiskoi akademii meditsinskikh nauk,
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Fel'dsher i akusherka,
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April 1990,
Klinicheskaia meditsina,
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January 1980,
Arkhiv patologii,
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December 2002,
Medical microbiology and immunology,
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January 1966,
Rivista italiana d'igiene,
V A Isakov, and
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October 1993,
Atencion primaria,
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June 1992,
Atencion primaria,
