HIV infects a type of white blood cell in the body’s immune system called a T-helper cell (also called a $CD _4$ cell). These vital cells keep us healthy by fighting off infections and diseases. HIV cannot grow or reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it. It then takes control of the cell’s DNA, replicates itself inside the cell, and finally releases more HIV into the blood – continuing the multiplication process. This is the HIV life cycle.
So the correct option is 'Undergoes reproduction in the host cell'
At which stage of HIV infection does on usually show symptoms of AIDS?