Ontario Respiratory Pathogen Bulletin

PHO monitors and analyzes the spread and intensity of respiratory pathogen activity and influenza in Ontario to support local, provincial, federal and global surveillance efforts.

The Ontario Respiratory Pathogen Bulletin (ORPB) is a comprehensive, weekly summary of provincial respiratory pathogen activity. Including information on the onset, duration, conclusion, geographic patterns, severity and progression of seasonal influenza activity.

Information for Health Care Providers

Healthcare worker influenza immunization coverage rate data for the 2018-2019 season can be found in the Week 13 ORPB.

Influenza antiviral medications are recommended for treatment of some individuals when influenza is circulating in your community (Table 5 of ORPB).

See our factsheet for more information (November 2017) on the use of antiviral medications for the treatment and prevention of influenza.

The ORPB is posted every Friday from November to April

Additional outbreak information can be found in our current Outbreak Supplement for April 2019.

For past reports, visit our Historical Bulletin page.

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Communicable Diseases


Updated 30 Aug 2019