disease

2. exposure of a pathogen, usually dead or weakened, to produce memory cells.
3. one-celled organisms that are more complex than bacteria
4. A unicellular organism that lacks a nucleus and membrane bound organelles
6. an organism, typically biting, that transmits a disease or parasite from one animal to another.
7. medicine used to save lives because it destroys harmful bacteria and cures infections
8. An abnormal state in which the body is not functioning normally
9. a bacterium, virus, or other microorganism that can cause disease.
11. weakened or killed microorganisms, toxins, or other proteins given to induce immunity
12. single-celled or noncellular spherical or spiral or rod-shaped organisms - cause disease in humans
14. organism whose cells contain a nucleus and membrane bound organelles
16. the period between exposure to an infection and the appearance of the first symptoms
17. More cases of a disease than expected in an area or among a group of people over a set time
18. Measures contributing to cleanliness and good health
19. An organism that lives on or in a host and causes harm to the host
20. A kingdom made up of eukaryotic organisms, reproduce by using spores,

1. an organization concerned with causes, spread, and control of diseases in populations, based in the United States
5. cell in which a virus can actively multiply or in which a virus can hide until activated
10. A rapid widespread outbreak of an infectious disease.
13. worldwide epidemic spread of a certain disease
15. A tiny, nonliving particle that invades and then reproduces inside a living cell.