H I V - AID

HIV stands for Human Immunodeficiency Virus. HIV is the virus that causes AIDS. While many viruses can be controlled by the immune system, HIV targets and infects the same immune system cells that are supposed to protect us from illnesses. These are a type of white blood cell called CD4 cells. HIV takes over CD4 cells and turns them into virus factories that produce thousands of viral copies. As the virus grows, it damages or kills CD4 cells, weakening the immune system.

i think all virus a natural that also a microorganism with vert short generation time. We human need thousand year to improve our immune system but HIV just need few min. to break it down!!!!

its a deadly uncurrable virus........ greetings. : )

How do you mean 'natural' virus? I don't quite get what you are hinting at.