Courtney

6. A bacterium,virus or microorganism that can cause disease.
7. A member of a large group of unicellular microorganisms.
9. A blood protein produced in response to and counteracting a specific antigen.
10. A widespread occurrence of an infectious disease in a community at a particular time.
12. A localised physical condition in which part of the body becomes reddened,swollen,hot and often painful.
13. An organism that transmits a pathogen, disease or parasite from one animal or plant to another.

1. The communication of disease from one person to another by close contact.
2. A small petrel of southern seas, having a wide bill fringed with comblike plates for feeding on planktonic crustaceans.
3. Something you develop over your lifetime.
4. A preparation that is used to stimulate the body's immune response against diseases.
5. The process of infecting or the state of being infected.
6. A widespread occurrence of an infectious disease over a whole country or the world at a particular time.
8. A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
11. An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.