Quantitative Fit Testing for Respirators Proper respirator use is essential for maintaining occupational safety for employees exposed to airborne hazards, including allergens and dust mites, which can trigger allergic reactions. A fit test ensures that a respirator forms a tight seal, preventing contaminants from entering the nasal passages. Conducting user seal checks to ensure that a respirator is donned properly before use is also crucial for maintaining an adequate seal. At AFC Urgent Care Rockville ...