| A | B |
|---|
| Active immunity | long-lasting immunity that results when the body makes its own antibodies in response to a specific antigen |
| Allergen | substance that causes an allergic reaction |
| Allergy | overly strong reaction of the immune system to a foreign substance |
| Antibody | a protein made in response to a specific antigen that can attach to the antigen and cause it to be useless |
| Antigen | any complex molecule that is foreign to your body |
| Biological vector | disease carrying organism, such as a rat, mosquito, or fly, that spreads contagious disease |
| Chemotherapy | use of chemicals to destroy cancer cells |
| Immune system | complex group of defenses that protects the body against pathogens – includes the skin and respiratory, digestive, and circulatory system |
| Infectious disease | disease caused by a virus, bacterium, fungus, or protest that is spread from an infected organism or the environment to another organism |
| Noninfectious disease | disease, such as cancer, diabetes, or asthma, that is not spread from one person to another |
| Passive immunity | Immunity that results when antibodies produced in one animal are introduced into another’s body; does not last as long as active immunity |
| Pasteurization | process in which a liquid is heated to a temperature that kills most bacteria |
| Sexually transmitted disease | infectious disease, such as Chlamydia, AIDS, or genital herpes, that is passed from one person to another during sexual contact |
| Vaccination | process of giving a vaccine by mouth or by injection to provide active immunity against a disease |
| Virus | a strand of hereditary material surrounded by a protein coating that can infect and multiply in a host cell |
