| A | B |
|---|
| communicable disease | an illness that can spread, usually from one person to the next |
| bacteria | tiny living things, some of which cause communicable diseases |
| virus | a kind of disease germ that causes some communicable diseases, for example, colds and flu |
| antibody | a substance made by the body that helps white blood cells destroy disease germs |
| immunity | a person's protection from or resistance to disease |
| AIDS | a disease caused by a virus that can destroy white blood cells that normally help fight off disease germs |
| vaccine | a medicine that contains weakened or dead disease germs or other products and that causes the body to form antibodies |
| antibiotic | a medicine that can kill or weaken certain kinds of bacteria |
| noncommunicable disease | an illness not caused by germs and that does not spread to other people |
| cardiovascular disease | any one of several noncommunicable diseases that affect the heart and blood vessels |
| diabetes | a noncommunicable disease in which the body does not make enough insulin and cannot use sugars in food as it should |
| cancer | a noncommunicable disease in which cells grow out of control and destroy healthy cells |
| arthritis | a noncommunicable disease that harms the body joints, causing redness, swelling, pain, and often crippling |
| allergy | a noncommunicable disease in which a person is sensitive to a substance, such as food or pollen |
