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How Viruses (like COVID-19) Can Affect Qualitative Respirator Fit Testing Results

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The Qualitative Respirator Fit Test is a method that relies on the ability of the test subject to detect a challenge agent such as Saccharin. It has been in use for decades and predates the evolution of Quantitative Fit Testing methods and equipment. Qualitative testing assumes that if any amount of the challenge agent penetrates […]