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Attention - New Registration and Login System

PHO has implemented a new registration and login system.

  1. Click here to re-register
  2. Click “create one” next to “No account?”.
  3. Enter the same email address previously associated with your account.
  4. Check your email for a security code.
  5. Enter the security code and follow the prompts.

If you have trouble re-registering, please read our Frequently Asked Questions or contact: webmaster@oahpp.ca.

Please note this does not impact PHO’s online Water Testing Portal.

The Ontario Respiratory Virus Tool

This tool provides comprehensive epidemiological information of respiratory virus activity in Ontario, including COVID-19, influenza and other respiratory viruses.

Explore the enhancements

Quick Access

Course

Looking to build or expand your knowledge in IPAC best practices? Check out our courses on IPAC.

Webpage
Updated 21 Aug 2025

Epidemiological Summary

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

607 KB
Updated 30 Oct 2025

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 24 Oct 2025

Fact Sheet

Information for clinicians regarding measles and appropriate measures to take when caring for patients with suspected measles.

292 KB
Updated 15 Aug 2025

Surveillance Report

Epidemiological summary of legionellosis activity in Ontario, with a focus on 2025 to date, 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 23 Oct 2025

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About PHO

Public Health Ontario (PHO) keeps Ontarians safe and healthy. With our partners in government, public health and health care, we prevent illness and improve health.

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