Definitions in Biology

1.Active Immunity: Immunity resulting from the development of antibodies in response to the presence of an antigen, as from vaccination or exposure to an infectious disease.
Adrenal:
1.At, near, or on the kidneys.
2. 2 Of or relating to the adrenal glands or their secretions.
Aids: A severe immunological disorder caused by the retrovirus HIV, resulting in a defect in cell-mediated immune response that is manifested by increased susceptibility to opportunistic infections and to certain rare cancers, especially Kaposi's sarcoma. …