Why do people with CF have to stay apart?

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Tags

1. #spreading
2. #germs
3. #mucus
4. #thrive
5. #disease
6. #allows
7. #medical
8. #certain
9. #clogs
10. #known
11. #studies
12. #multiply
13. #others
14. #particular
15. #cross
16. #infection
17. #thick
18. #sticky
19. #people
20. #lungs
21. #among