Across
- 1. a system that is in your body
- 4. a period of 100 years
- 7. painkiller for viruses
- 8. a sickness or virus
- 11. a call to engage in a contest or fight
- 12. a medicine that treats disease
- 13. a way of doing something
Down
- 2. a way to do something
- 3. something that causes disease
- 5. a widespread of an infection
- 6. a word that is using with numbers
- 9. a viruses in the body causing disease
- 10. a period of time