Knowledge about HIV

The Basics
HIV is a virus that infects and destroys CD4 cells. CD4 cells are part of the body’s immune system. The immune system protects the body from invaders. When the immune system loses too many CD4 cells, it becomes weak and is unable to fight off germs. At this point, you are vulnerable to AIDS-related opportunistic infections (OIs) that can cause serious illness or death.
HIV Treatments
Scientists have developed drugs that block HIV from reproducing (multiplying) at different stages of its life cycle. So far there are four classes of drugs:
Fusion inhibitors
Nucleoside/nucleotide reverse transcriptase inhibitors (“nukes” or NRTIs)
Non-nucleoside reverse transcriptase inhibitors (“non-nukes” or NNRTIs)
Protease inhibitors (PIs)