PATHOLOGY

Detailed explanation-1: -HIV binds to the CD4 molecule on the surface of helper T-cells and replicates within them. This results in destruction of CD4+ T-cells and leads to a steady decline in this population of T-cells.

Detailed explanation-2: -HIV infects a type of white blood cell in our immune system called a T-helper cell (also called a CD4 cell). These cells keep us healthy by fighting off infections and diseases. However, HIV hides inside these cells, tricking the body so that the immune system can’t find and destroy it.