Across
- 2. Connected with breathing
- 7. A serious disease affecting one's lungs
- 8. A disease caused by germs or bacteria
- 10. A substance that is put into the blood and protects the body
Down
- 1. Be spread to other people by touch
- 3. Showing no symptoms
- 4. Kill the bacteria in or on sth.
- 5. Being kept separate from other people or animals for a set of time
- 6. A disease that affects many people over a very wide area
- 9. New and different from anything known before