AP BIOLOGY

Detailed explanation-1: -The human immunodeficiency virus (HIV) targets the immune system and weakens people’s defense against many infections and some types of cancer that people with healthy immune systems can more easily fight off.

Detailed explanation-2: -HIV (Human Immunodeficiency Virus) is a virus that attacks the immune system. (The immune system fights infections and diseases in a person’s body.) Over time, HIV weakens a person’s immune system so it has a very hard time fighting diseases. HIV causes AIDS (Acquired Immune Deficiency Syndrome).

Detailed explanation-3: -HIV infects and destroys certain white blood cells called CD4+ cells. If too many CD4+ cells are destroyed, the body can no longer defend itself against infection. The last stage of HIV infection is AIDS (acquired immunodeficiency syndrome).

Detailed explanation-4: -The human immunodeficiency virus (HIV) is grouped to the genus Lentivirus within the family of Retroviridae, subfamily Orthoretrovirinae [1]. On the basis of genetic characteristics and differences in the viral antigens, HIV is classified into the types 1 and 2 (HIV-1, HIV-2).

Detailed explanation-5: -HIV destroys CD4 T cells-white blood cells that play a large role in helping your body fight disease. The fewer CD4 T cells you have, the weaker your immune system becomes.