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How does the N95 mask pass the American NIOSH standard?

Submitted by abc123 • October 16, 2020

N95 mask refers to the mask that passed the US NIOSH standard, but do you know how to pass it?The National Institute of Occupational Safety and Health (NIOSH) works at the Centers for Disease Control and Prevention (CDC), a federal agency that specializes in generating new knowledge in the field of occupational safety and health and turning that knowledge into practice to improve workers.