Across
- 4. Cells in the blood that fight microorganisms.
- 5. The vaccines contain this so you don't get the disease but still create immunity.
- 6. Cells Long lived white blood cells which is able to respond very quickly to the disease, by producing antibodies when microorganisms enters your body for the second time.
Down
- 1. A group of proteins made by white blood cells to fight dangerous microorganisms.
- 2. Introducing a chemical into the body used to make a person immune to a disease.
- 3. Living organisms that can be seen when looking through a microscope.