5.1.1 Mask selection Surgical Masks  vs N95 Respirators Standard N95 Respirators vs Surgical N95 Masks

  • Larger particles: captured by filter fibers directly when they impact or intercept the fibers
  • Smaller particles: constantly bombarded by air molecules, causing them to deviate from the air stream and come into contact with a fiber
  • Oppositely charged particles: attracted to charged fiber 

* All particles that come into contact with a fiber will stay attached to the fiber firmly, thus filters can capture particles smaller than the pore size.

5.1.3 How to Wear and Take-off Surgical Masks Properly?