Across
- 2. COVID variant that causes more severe lung damage
- 3. Windpipe that carries air to the lungs
- 6. COVID variant that spreads fast but is often milder
- 7. Upper airways where Omicron replicates quickly
- 9. When the immune system overreacts and causes harm
Down
- 1. Tiny air sacs where gas exchange occurs
- 4. Chemical signals released by the immune system
- 5. Virus that caused the global pandemic in 2020
- 8. Condition where alveoli fill with fluid and oxygen can't pass