The human immunodeficiency virus (HIV)that causes the disease known as AIDS selectively infects ________, which leads to clinical problems.
C)cytotoxic T cells
D)helper T cells
E)suppressor T cells
________ is the ability to produce a normal immune response upon exposure to an antigen.
Which of the following is an example of autoimmune disease?
D)immune complex disorder
Sensitization to an allergen during the initial exposure leads to the production of large quantities of