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  • Content Type: Abstract

    In 2005, the Cook County Department of Public Health (CCDPH) began using the Electronic Surveillance System for the Early Notification of Community-based Epidemics (ESSENCE) as an emergency department (ED)-based local syndromic surveillance program… read more
    … flat files) and contain a unique patient identifier, visit date and time, zip code, age, sex, and chief … flat files) and contain a unique patient identifier, visit date and time, zip code, age, sex, and chief …