Mortality Rate Patterns for Hemorrhagic Fever with Renal Syndrome Caused by Puumala Virus
Marika Hjertqvist, Sabra L. Klein, Clas Ahlm, and Jonas Klingström
Author affiliations: Author affiliations: Swedish Institute for Infectious Disease Control, Solna, Sweden (M. Hjertqvist, J. Klingström); The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA (S.L. Klein); Umeå University, Umeå, Sweden (C. Ahlm, J. Klingström); Karolinska Institutet, Stockholm, Sweden (J. Klingström)
Figure 1. Incidence of acute nephropathia epidemica (NE) and case-fatality rates, Sweden, 1997–2007. A) Age distribution for male and female patients with acute NE. B) Age distribution of case-fatality rates for all patients with acute NE. The Swedish Death Register was used to identify all deceased persons with a diagnosis of NE. Numbers of deaths during different periods after diagnoses were 21 (13 male patients and 8 female patients) during the acute phase (<3 months after diagnoses), 7 (5 male patients and 2 female patients) after the acute phase (>3 months after diagnoses) but <1 year later, and 24 (19 male patients and 5 female patients) during the second year after diagnoses.
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