HIV is the virus that is responsible for AIDS disease. Primarily this virus originated in the animals of Africa and thereafter it was transmitted to the human beings in the late 19th century. There are two kinds of HIV virus that pass on the disease to the human beings: HIV-1 and HIV-2. While HIV-1 is more active and is responsible for the major HIV infections throughout the world, HIV-2 is less infectious and is mostly restricted to the West Africa.Most esteemed Scientists and academicians who attended the discussion events of Royal Society of London in 2001, had debated that accidental vaccine infectivity (oral polio vaccine, which was partially derived from the live polio viruses from monkey kidney cells) was largely responsible for the subsequent spread of AIDS, to most African villagers. However, this theory was later rejected, as the chimpanzees were not proving to be used in the manufacture of the vaccine.
Most HIV researchers agree that HIV virus began from the inhabitants of wild chimpanzees in the West-Central Africa. Scientists thought that the transfer from chimpanzees to the human race most likely took place in the early 20th century during rapid colonization of South Africa. According to the Hunter theory, the virus was transmitted from the chimpanzees to the humans when a hunter was bitten or cut while hunting or butchering the animal. This exposed the blood of the hunter to the other bodily fluids of the chimpanzees thereby leading to AIDS.
Prevention of AIDS:
Sex: HIV is commonly present in the fluids of the body, which includes blood, and sexual fluids. AIDS can be prevented by resorting to safer sex. Use of condoms can prevent transmitting of the disease.
Injection: The use of the same syringe that has already been used in the HIV infected person by another person who does not have that disease can easily infect the other person by blood transmission. Hence, one must be careful in hygienic matters and throw away any syringe already used by a person.
Child transmission: Mothers having HIV virus during pregnancy can pass this infection to her baby in her womb. Even if the mother is safe during pregnancy but gets infected after the birth of the child, she can still get the child infected through breast-feeding.
Blood Transfusion: In the case of blood transfusion, a person can get infected if he receives the blood of any infected person. Hence, it is absolutely essential that the blood be tested before it is ready for transfusion.