AIDS

AIDS is a great danger of infectious disease, caused by infection with HIV (HIV virus). HIV is a human immune system to attack the virus. It is the body's immune system is the most important T lymphocytes as the main target, a lot of damage to the cells, so that the loss of immune function of the body, so the body susceptible to infection of various diseases, and malignant tumors, high mortality. HIV in the human body average incubation period of 8-9 years before AIDS, may not have any symptoms to live and work for many years.