Influenza (flu)

The influenza virus or “flu” is a respiratory virus that circulates in Ontario, most frequently in the fall and winter. Influenza spreads from person-to-person through coughing, sneezing or having face-to-face contact. It can cause mild to severe respiratory disease. While anyone can get influenza, the very young, the elderly and people with certain medical conditions are at higher risk of complications. The best way to prevent infection is to receive the seasonal influenza vaccine every year.

Featured

 

Event

PHO Learning Exchange: Wastewater Surveillance Collaboration at York Region: Sampling, Science and Solutions

This session explores the collaborative framework, analytic methodologies, and public health applications of wastewater data. Attendees will gain insight into how interdisciplinary partnerships can strengthen surveillance systems, improve responsiveness, and inform future public health strategies. The presentation also discusses lessons learned, challenges encountered, and opportunities for scaling wastewater surveillance across jurisdictions.

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Contact the Department

Communicable Disease Control

Communicable.DiseaseControl@oahpp.ca

Updated 3 Oct 2025