THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Human immunodeficiency virus (HIV) is an infection that attacks the body’s immune system, specifically the white blood cells called CD4 cells.

Detailed explanation-2: -The human immunodeficiency virus (HIV) is the virus that causes HIV infection. HIV causes acquired immunodeficiency syndrome (AIDS), the most advanced stage of HIV infection.

Detailed explanation-3: -CD4 count (or T-cell count) CD4 cells (also known as CD4+ T cells) are white blood cells that fight infection. CD4 cell count is an indicator of immune function in patients living with HIV and one of the key determinants for the need of opportunistic infection (OI) prophylaxis.

Detailed explanation-4: -HIV starts destroying T-lymphocytes, specifically the T-helper cells. Viruses generally lack the ability to replicate by themselves, outside a host cell.