HIV attacks the immune system by using white blood cells to replicate itself, weakening the body's ability to fight infection over time without treatment. It was first recognized in 1981 and is thought to have originated from non-human primates in Africa, spreading to humans in the early 20th century. HIV is transmitted through bodily fluids like blood, semen, vaginal fluids and breast milk. While there is no cure for HIV, antiretroviral therapy can control the virus and allow those infected to live a normal lifespan, though they must remain on daily medication.

1. HIV (Human Immunodeficiency Virus) By Daniel David Grupe