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Respiratory Diseases

Respiratory Diseases

Respiratory diseases are caused by organisms such as viruses or bacteria that affect the respiratory system (e.g., lungs and throat). The organisms can be spread by coughing, sneezing or face-to-face contact.

We provide public health workers with expertise, support and resources for the prevention and control of infectious respiratory diseases.

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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 25 April 2025

Surveillance Report

Short-term projections of SARS-CoV-2, influenza, and respiratory syncytial virus (RSV) activity, and risk of related severe disease among pediatric and general adult population groups.

1.7 MB
Updated 28 March 2025

Best Practice

This document provides best practice infection prevention and control guidance for preventing and managing acute respiration infections in all health care settings.

2.4 MB
Updated 2 Dec 2024

Surveillance Report

This report summarizes Mycoplasma pneumoniae laboratory testing performed by Public Health Ontario, with a focus on testing in 2024.

279 KB
Published 29 Nov 2024

Epidemiological Summary

This report describes the epidemiology of tuberculosis (TB) in Ontario, presenting data on active TB disease and latent TB infection, including incidence by sex, age group, and geography.

Webpage
Updated 21 April 2025

Surveillance Report

Inaugural genomic surveillance of RSV in 2023/24 describes two predominant lineages: RSV-A lineage GA2.3.5 and RSV-B lineage GB5.0.5a.

1.1 MB
Published 7 June 2024

Blastomycosis

Coronavirus Disease 2019 (COVID-19)

Enterovirus D68

Group B Streptococcal Diseases, Neonatal

Invasive Group A Streptococcus

Influenza (flu)

Legionellosis

Leprosy

Middle East Respiratory Syndrome Coronavirus

Nontuberculous Mycobacteria Infections

Tuberculosis

Avian Influenza
Event

PHO Rounds: The SickKids Immunization InfoLine

This PHO Rounds session will review the development and implementation of the InfoLine, provide an overview of the calls received to date—including call volume and common inquiries—and share key insights gained from the experience.

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Updated 13 Dec 2024
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