Communicable Dissease

2. (of a disease) prevalent over a whole country or the world.
3. A disease caused by microorganisms that invade tissue.
7. a harmful substance produced within living cells or organisms.
8. a biological preparation that provides active acquired immunity to a particular infectious disease.
10. an infectious agent that can only replicate within a host organism.
11. the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.

1. a blood protein produced in response to and counteracting a specific antigen.
2. a bacterium, virus, or other microorganism that can cause disease.
4. a widespread occurrence of an infectious disease in a community at a particular time.
5. an organism, typically a biting insect or tick, that transmits a disease or parasite from one animal or plant to another.
6. microscopic organisms not visible with the naked eye.
9. a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.