Across
- 3. occurs when a person's immune system reacts to substances in the environment that are harmless to most people.
- 5. an injury that occurs when you roll, twist or turn your ankle in an awkward way
- 6. break or crack in one of the bones in your leg
Down
- 1. invasion of the body by harmful microorganisms or parasites.
- 2. mild infection of your upper respiratory tract
- 4. contagious respiratory illness caused by influenza viruses.