If you are wondering why the HIV virus unlike other viruses kills you and if you have not accepted the catholic explanation that all Africans who get aids are sinners and deserved it you might want to continue reading.
The reason that our otherwise extremely impressive immune system is not able to cope with the HIV virus in the long run, is that the virus has a very high mutation and proliferation rate. Following any type of virus infection, the number of viruses in your body will go up exponentially, however, once your immune system is able to recognize the virus it will mobilize its troops (the white blood cells) and destroy the invader.
The same thing happens when someone is infected with HIV, first the number of viruses go up, then down. However, because of its rapid mutation rate, some of the HIV viruses will change so much that the immune system no longer recognize the virus. This new virus, which has evolved by natural selection will proliferate. Our immune system will soon be able to recognize the new invader, but then yet a different virus will be present. This constant race will go on for about ten years. At that time the HIV virus will have killed of so many white blood cells (the HIV virus is specifically targeting white blood cells) that the body can no longer defend itself against otherwise non-fatal infection, and you will die, perhaps, from a simple flu.
