Across
- 3. a type of B-cell that is activated upon a second exposure of an antigen
- 4. response that acts immediately to pathogens
- 5. a type of foreign molecule that triggers a immune response
- 6. a type of phagocytic Antigen Presenting Cell
- 8. attenuated virus that triggers an immune response and if exposed host has a secondary response
Down
- 1. plays an important role in the immune system, also known as a white blood cell
- 2. another word for antibody
- 7. a type of "killer" T-Cell