Here are some additional uses of masks:

1. Motorcyclists and cyclists: Wear masks to protect themselves from wind, dust, and debris.

2. Athletes: Wear masks to protect themselves from injury, such as mouthguards in football or hockey.

3. Military personnel: Wear masks for protection from chemical and biological agents, as well as for camouflage.

4. Firefighters: Wear masks to protect themselves from smoke and toxic fumes.

5. Musicians: Wear masks to protect themselves from instrument materials, such as wood dust or metal shavings.

6. Factory workers: Wear masks to protect themselves from dust, chemicals, and other hazardous materials.

7. Surgeons: Wear masks to prevent the spread of germs and bacteria during surgical procedures.