How does HIV affect the body?

Normally, the human immune system is the body’s protection against bacterias, viruses, etc.; it is like a coat of armor. When HIV enters the body, it starts poking holes in the armor. Eventually, the armor becomes very weak and unable to protect the body. Once the armor is very weak or is gone, the person is said to have AIDS. An AIDS diagnosis is generally made when either the body's protective T-cells drop below a certain level, or the HIV-positive individual begins to experience opportunistic infections. An opportunistic infection is an infection that would not normally affect an otherwise healthy person. Oftentimes, it's these infections that are the cause of illness or death in HIV-positive individuals - not the virus itself. If people do not get any treatment for HIV disease, it takes an average of 8-10 years to progress from HIV to AIDS.