Question

Acquired immunodeficiency syndrome $\left(AIDS\right)$ is :

• A. Result of inability of the body to produce interferons
• B. An autoimmune disease
• C. Reduction in the number of Helper-T cells
• D. Reduction in the number of Killer-T cells

Answer 1

The correct option is C Reduction in the number of Helper-T cells

$AIDS$ or Aquired ImmunoDeficiency Syndrome is a fatal sexually transmitted disease that is caused by the Human Immunodeficiency Virus $\left(HIV\right)$.

$HIV$ attacks and destroys the helper $T$ lymphocytes or helper $T$ cells in the body.

The helper $T$ cells in the body are responsible for the stimulation of $B$ lymphocytes to produce antibodies against antigens/virus and triggering the cytotoxic $T$ cells to kill any foreign cell that enters the body.

Thus their destruction causes a severe deficiency in the immune system, making the person vulnerable to opportunistic infections which can only attack when the immunity is compromised