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While studying a genetic code of a human immunodeficiency virus of the second type HIV-2 - less terrible and more widespread version of the virus, scientists have found out some data which can help to create vaccine against AIDS.

Scientists from Oxford and British Medical Research Center inform that both forms of the virus, HIV-1 and HIV-2 can infect the person. But if HIV-2 leads to AIDS development only in 20 % of the cases, HIV-1 causes AIDS in 98 % of the cases.

Taking into account these facts, experts have decided to find out, why the immune system of people can resist to attacks of HIV-2 which is substantially limited to the territory of the Western Africa.

To study influence of the virus on the immune system scientists have chosen the group of the women living in Gambia which have been infected with HIV-2 more ten years ago.

It appeared that the small part of a gene gag makes the HIV-2 vulnerable for attack of the immune system. Also it became known that gag has almost never changes. Moreover, this gene sends a signal to Т-cells which destroy a virus before it influence has affected the entire organism.

Having obtained such encouraging data, physicians hope to invent shortly a vaccine which will be able to stop decrease of immunity which leads AIDS.