Research at PHO

Our updated research pages better reflect the depth and diversity of our work.

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Interactive Report

This tool provides comprehensive epidemiological information of respiratory virus activity in Ontario, including COVID-19, influenza and other respiratory viruses. Explore case trends, laboratory testing, and outbreaks, as well as COVID-19 outcomes and vaccination.

Webpage
Updated 21 Nov 2025

Epidemiological Summary

Epidemiology of measles cases in Ontario with a focus on the current outbreak.

617 KB
Updated 13 Nov 2025

Epidemiological Summary

This report provides an epidemiologic summary of iGAS activity in Ontario from October 1, 2025 to October 31, 2025, compared to the previous seasonal iGAS activity in the three post-pandemic seasons, as well as the five pre-pandemic seasons.

1.1 MB
Updated 13 Nov 2025

Best Practice

This document provides guidance for risk factor-based screening and IPAC management of cases of human-to-human transmissible VHF.

845 KB
Published 14 Nov 2025

Surveillance Report

Epidemiological summary of legionellosis activity in Ontario displaying trends over time, by sex and age group, and by public health unit; number of patients tested and percent positivity; and severity indicators.

1.1 MB
Updated 6 Nov 2025

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