Across
- 5. Pa____on.
- 6. Disease which affects a small group of people
- 7. The title name
- 8. Antigens which produce immunity.
- 9. Covid-19
- 10. The active cycle of a virus
Down
- 1. A system which helps us fight diseases.
- 2. The passive cycle of a virus.
- 3. organisms which can cause diseases.
- 4. The substance which protects the Inner core.