Across
- 3. A protein made by B cells that binds to specific antigens.
- 4. A molecule on a pathogen that triggers an immune response.
- 5. A protein complex that displays antigens on Dendritic cell surfaces for recognition.
- 6. An overreaction of the immune system to a harmless substance.
Down
- 1. A preparation that stimulates immunity without causing disease.
- 2. A white blood cell, such as a B or T cell, that is key to immunity.