CORHA Thresholds for Reporting and Investigating Cases of Influenza
The thresholds and outbreak definitions presented below are based on available scientific resources and expert opinion and intended only as guidance for potential adaptation to the local epidemiology of influenza; for example, states and localities may have their own outbreak definitions and reporting requirements. The information provided here does not replace reporting as part of state and local influenza surveillance. Suggested thresholds are intended to expedite facilities’ investigation of cases and reporting to public health authorities, thus ensuring early detection of possible outbreaks and timely intervention to prevent the virus’ spread. Detailed guidance for investigation and management of influenza outbreaks is available from Centers for Diseases Control and Prevention (CDC). Healthcare facilities should consult public health authorities if they have questions.
Date Posted: May 2021