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Public Health Surveillance/Infectious Disease

What is Public Health Case Surveillance?

Public health case surveillance has been defined as “the ongoing, systematic collection, analysis and interpretation of health-related data with the a priori purpose of preventing or controlling disease or injury and identifying unusual events of public health importance, followed by the dissemination and use of such information for public health action.”

In simpler terms, public health case surveillance "investigates, diagnoses, and addresses health problems, and hazards affecting the population."  The data collected during case surveillance is to be used for public health purposes only, to engage and protect stakeholders.  Public health case surveillance places a high priority on the protection of personal information.

Healthcare professionals are traditionally mandated to notify public health authorities about cases of specified diseases within a certain time-frame. The authorities then analyze the data and take appropriate action. 

The chart below shows the number and type of case investigations that were done during Q3 of 2021.

COVID19 investigation numbers are not included in this chart as they were done separately.  Information about COVID19 in the ECDHD jurisdiction can be found here: