Reliable Information Sources


Please note that all of WDG Public Health’s COVID-19 resources (excluding images) are available for use and adapting for non-profit purposes, permission is not required. We ask that you include the statement “Adapted from Wellington-Dufferin-Guelph Public Health” on any materials you use or adapt.

COVID-19 Call Centre

  • 519-822-2715;
    • Ext. 7006 (for health-related questions) Monday - Friday 9 a.m. to 4 p.m.
    • Ext. 4020 (for non-health-related general questions about COVID-19 incl. business or workplace concerns, social distancing questions or non-emergency reporting questions) Monday to Friday, 9 a.m. to 4 p.m.


Please check these website frequently as they are updated with new information in regards to COVID-19.

Evidence-based Information on Face Coverings

Dr. Nicola Mercer, our Medical Officer of Health, monitors the epidemiological evidence regarding virus transmission and face covering usage daily and reviews new studies as they are published. Based on her review, the evidence supports wearing a face covering as a reasonable and effective tool to help slow the spread of the virus. Wearing a face covering when in public spaces protects others from your respiratory droplets and may reduce your exposure to virus particles, and is a simple step everyone can take to do their part - along with physical distancing, hand-washing and not touching your face. Public Health experts consistently and strongly recommend wearing face coverings to help slow the spread of the virus and to protect members of the community, especially those who are unable to wear a face covering or other vulnerable individuals like the elderly or those with underlying medical conditions.

Below you will find a collection of expert opinions and studies on face coverings. This list is for informational purposes only and is not representative of all articles and studies available on the subject, nor does this list cover all articles and studies that are reviewed by our epidemiologists and our Medical Officer of Health. Research and articles on face coverings and masks are available online for those who are interested to read further.

Expert Opinions

Evidence and Studies on Face Coverings (Updated on November 18, 2020)