Total number of cases reported and fatality rate of 2009 H1N1 influenza in California, April 3, 2009 - August 10, 2010.

Abbreviations: ICU, intensive care unit.aRates were calculated using 2009 statewide age-specific population projections published by the State of California Department of Finance (URL: http://www.dof.ca.gov/research/demographic/data/race-ethnic/2000-50/).bExcludes non-hospitalized fatalities; the case-fatality ratio is calculated using the following formula: (number of fatal ICU cases from age group/total number of ICU cases within that age group)*100.