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Canada's CPHO on X: "#DYK There are different types of #masks available for public use? Medical masks, non-medical masks and respirators can all be used in the community. Learn which one is
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What is the efficacy of standard face masks compared to respirator masks in preventing COVID-type respiratory illnesses in primary care staff? - The Centre for Evidence-Based Medicine
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Effectiveness of N95 Masks against SARS-CoV-2: Performance Efficiency, Concerns, and Future Directions | ACS Chemical Health & Safety
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Choosing and wearing face masks: Updated guidance on what you need to know - Dal News - Dalhousie University
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Is your N95-style mask failing you? Lab tests show some falling way short of filtration standards | CBC News
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Use of Respiratory Protection Among Responders at the World Trade Center Site --- New York City, September 2001
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