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Ontario Respiratory Pathogen Bulletin​

Information for health care providers

Influenza antiviral medications are recommended for treatment of some individuals when influenza is circulating in your community. See our factsheet for more information (November 2017) on the use of antiviral medications for the treatment and prevention of influenza.

For information on influenza circulation in your community, see Table 5 in the Ontario Respiratory Pathogen Bulletin. 

The ORPB is posted every Friday from November to April.  

 For more information:

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. As well, in the bulletin, you will find information on the onset, duration, conclusion, geographic patterns, severity and progression of seasonal influenza activity.

Healthcare worker influenza immunization coverage rate data for the 2017-2018 season can be found in the  Week 14 ORPB.

​Information to note for the 2018-2019 influenza season:

  • The respiratory virus testing algorithm at Public Health Ontario Laboratories has been updated for the 2018-2019 influenza season. Please refer to footnotes and section 8 "Data sources for this report" in the ORPB for additional information.

​View this week's PDF report.​

The Ontario Respiratory Pathogen Bulletin for Week 7 will not be published on Friday, February 22, 2019, and will instead be published on Monday, February 25, 2019.

View the current Outbreak Supplement.​​

​​​Scroll down to see the interactive​​ version of the report and map.









Looking for reporting information or seasonal summaries? Check out the bott​om of this page.​


Provincial surveillance reporting
For public health units conducting surveillance monitoring activities, please refer to the following surveillance submission information for the current season:

2018-19 Surveillance Weeks

2018-19 Surveillance Package

Ontario Influenza Activity
        Report Form

View the archived reports and maps

Related Links

Reports from other jurisdictions

Public Health Agency of Canada

United States Centers for Disease Control and Prevention

Flu News Europe
European Centre for Disease Prevention and Control and World Health Organization

Page last reviewed:  
Page last updated: 2019-02-19 2:50 PM
Uncontrolled print copy. Valid only on day of Print: [date]
Page updated on [date/time] 2019-02-19 2:50 PM
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