| A | B |
|---|
| Immunity | Resistance to a disease-causing organism |
| Active and Passive | The two kinds of immunity |
| Vaccination | Antigens are introduced into the body to promote production of antibodies |
| Allergies | Result of an overly sensitive immune system |
| Histamines | Produced by the immune system, cause allergy symptoms |
| AIDS | caused by a virus that hides in healthy cells |
| Active Immunity | Immune system responding to the presence of an antigen |
| Passive Immunity | Anibodies that come from a source other than your own immune system |
