retrovirus, which means that its primary genetic instructions are in the form of RNA,
not DNA. The HIV virus divides into two kinds: HIV-1 and HIV-2. HIV-1 is the most
generally prevail. HIV-2 is basic only in the western Africa area, and it is more virulent,
faster progression and associated with greater morbidity. During 1983-1984, French
and American scientists separate the virus from the blood, respectively. HIV origin
possibly comes from apes and monkeys in Africa. Robert Gallo goes to France, provides
HTLV-lllB/H9 to compare with IDAV(LAI), the result of two virus are the same. Both
side agree to hold the conference together. In 1986, this virus is called “the human
immunodeficiency virus”. AIDS is distinguishes in U.S.A in early 1980. At that time, the
patients were homo-sex. So, AIDS is also called “homosexuality sickness” (gay disease).
And the government that Reagan president neglect the problem that time. After doctors
and scientists continually work, accumulated the belief epidemiology data, it show that
AIDS has constant way of infection. Simultaneously, because of blood transfusion to
cause AIDS is increase gradually, many scientists star to investigate this infectious cause
of disease. The diameter of human immunodeficiency virus is about 120 nanometers,
assume sphere. Each virus particle has a lipid envelope, a little plasma membrane that
enclosed it. Protein spike from the envelope, extend across it, or line its inner surface.
After HIV infect a person, virus particles enter the bloodstream. At this stage, B cell
makes antibodies that can be detected, helper T cell and killer T cell also form.
However, the adaptive immune response begins to slow.
The symptoms include: lymph gland plant, fever, lose weight, asthma, have the
pink or purple pale, even have the tumor
There are three ways of infection AIDS: the sexual contact, the blood contact
and the maternal infant infects. AIDS is transmitted by body fluids. An infected
person’s body fluids including blood, semen and vaginal secretion all contain the AIDS