Why are plague masks scary?

Related questions

1. What site is SCP 049 at?
2. Why did the plague doctor have a glass eye?
3. What does the plague doctor do?
4. What cured the plague?
5. What is the difference between FTP and SCP?
6. What is the pestilence SCP 049?
7. Can the plague be cured?
8. When was the last case of the plague?
9. Why is SCP 049 so popular?

Tags

1. #counter
2. #theory
3. #thought
4. #disease
5. #doctors
6. #would
7. #disproved
8. #plague
9. #miasma
10. #known
11. #principal
12. #cause
13. #becoming
14. #believed
15. #infected
16. #which
17. #prevent
18. #before
19. #smells
20. #purpose
21. #herbs