Factors associated with death or hospitalization due to pandemic 2009 influenza A (H1N1) infection in California

JK Louie, M Acosta, K Winter, C Jean, S Gavali… - Jama, 2009 - jamanetwork.com
Context Pandemic influenza A (H1N1) emerged rapidly in California in April 2009.
Preliminary comparisons with seasonal influenza suggest that pandemic 2009 influenza A
(H1N1) disproportionately affects younger ages and causes generally mild disease.
Objective To describe the clinical and epidemiologic features of pandemic 2009 influenza A
(H1N1) cases that led to hospitalization or death. Design, Setting, and Participants
Statewide enhanced public health surveillance of California residents who were …