epidemiology e Incidence a General population 1-11. 6 per 1000/ year a>65 years 25-44 per 1000/year s>65 years(institutionalized 68-114 per 1000 /year 命 Hospitalization a GPs office 17-35 命 Mortalit Overall 1-39 s Hospitalized patients 6-249 a Requiring icu 22-579 Niederman, MS, et al(1986). Crit Care Clin. 2(3 ): 471-95 Marrie, TJ (1994). Clin Infect Dis 18(4):501-13; Marrie TJ9(1998). Infect Dis Clin North Am 2(3): 723-40Epidemiology Incidence General population 1-11.6 per 1000/year > 65 years 25-44 per 1000/year > 65 years (institutionalized) 68-114 per 1000/year Hospitalization GP’s office 17-35 % Mortality Overall 1-3 % Hospitalized patients 6-24 % Requiring ICU 22-57 % Niederman, MS, et al (1986). Crit Care Clin. 2(3):471-95. Marrie, TJ (1994). Clin Infect Dis 18(4):501-13; Marrie TJ 9(1998). Infect Dis Clin North Am 2(3):723-40