Abstract
Introduction: Syndromic surveillance systems can be useful in detecting naturally occurring illness.
Objectives: Syndromic surveillance performance was assessed to identify an early and severe influenza A outbreak in Denver in 2003.
Methods: During October 1, 2003-January 31, 2004, syndromic surveillance signals generated for detecting clusters of influenza-like illness (ILI) were compared with ILI activity identified through a sentinel provider system and with ...