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HIV / AIDS worldwide 
The United Nations HIV / AIDS Joint Programme (UNAIDS), according to the world in 1994 to 17 million HIV / AIDS has reached 33.6 million people living on December 1999 this figure has been reported (Figure 1).

Epidemic (outbreak) since the beginning of the lives of 16.3 million people with HIV / AIDS, and is lost, 12.7 million of these cases and 3.6 million adults aged 15-49 is composed of children under the age of 15. In 1999, 5.6 million new cases were reported, the numbers of 16,000 per day, up to 11 new cases are added. Data, the last two years, the total HIV / AIDS patients is an increase of 10% over the previous year and 10% of newly infected patients under 15 years and 50% report that the young people aged 15-24. These data indicate that the disease first seen the first age of the most significant changes epidemideki's descent from 20 to 15. The second important difference is that the epidemic in the early 40-to 50% with 20% of infected women is increased. Epidemiologists can not return to trend in equalized estimate that the rate of men and women.



HIV / AIDS worldwide, 94% of cases in developing countries, 86% in sub-Saharan Africa, South and Southeast Asia is seen. Cases where it is the first in North America and European countries since 1994, the number of new cases diagnosed each year, not more than the previous year, while Africa, India, Thailand in Asian countries such as the number of cases is increasing exponentially. The main reason for this difference is thought to stem from education, because the developed countries with effective education programs for HIV / AIDS, and seems to have managed to teach the ways of protection. Another important factor in education programs as well as economic power is considered. Developing countries with limited budgets, a growing number of treated patients are forced to make the necessary costs, along with yürütememektedirler training programs.

In some developing countries and industrialized countries held a variety of programs to prevent the spread of HIV infection. Studies for prevention of intravenous drug use, policies that limit the use of imported blood, although none of them made a clean syringe replacement programs in preventing transmission of HIV by itself does not seem to be enough programs.