5.1.1 Mask selection

5.1.1.1 Surgical Masks vs N95 Respirators
5.1.1.2 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?