Across
- 2. found on surface of virus
- 4. may occur after vaccination
- 5. modified virus
- 9. the body building protection
- 10. disease causing organisms
- 11. time it takes to be fully vaccinated
- 12. white blood cells that digest
Down
- 1. a type of vaccine that is a harmless protein
- 3. called memory cells
- 6. produce antibodies
- 7. piece of a protein produced by a pathogen
- 8. safer vaccine to produce