Across
- 3. a vaccine that teaches the body cells how to make a protein to fight for future infection
- 5. a secondary effect of a drug
- 7. a substance that triggers an immune response in the body to produce antibodies
Down
- 1. a type of white blood cell that helps fight the virus
- 2. white blood cells that consume dead or dying cells
- 4. a microorganism that causes disease
- 6. protection from a virus