Vocabulary list

3. t cells required for almost all adaptive immune responses.
4. a substance used to stimulate immunity to a particular infectious disease or pathogen, typically prepared from an inactivated or weakened form of the causative agent or from its constituents or products.
6. refers to abnormal, pathogenic agents that are transmissible and are able to induce abnormal folding of specific normal cellular proteins called prion proteins that are found most abundantly in the brain.
9. the state or quality of being resistant to a particular infectious disease or pathogen.
10. microorganisms that are always present on or in a person and usually do not cause any disease.
11. atoxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
12. a microorganism, especially a bacterium causing disease or fermentation.
13. a person who receives or entertains other people as guests.
14. a single-celled organism of the kingdom Protista, such as a protozoan or simple alga.
15. microscopicic organisms that can infect hosts, like humans, plants or animals.

1. the communication of disease from one person to another by close contact.
2. a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
3. arguably the most important cells in adaptive immunity
5. a type of white blood cell that makes infection-fighting proteins called antibodies.
7. any of a group of spore-producing organisms feeding on organic matter, including molds, yeast, mushrooms, and toadstools.
8. a type of cell within the body capable of engulfing and absorbing bacteria and other small cells and particles.