The "Latest Report on the Global AIDS Epidemic 2007" published by the United Nations Program on HIV/AIDS and the World Health Organization on November 20, 2007 estimated that there were 33.2 million people infected with HIV worldwide in 2007.

The number of adults infected with HIV has been showing a stable trend in recent years, accounting for approximately 0.8% of the world's total population. In 2007, more than 2.5 million people were newly infected with HIV.

The study also shows that AIDS patients will no longer infect others if treatment is effective. However, the Swiss Federal Commission on AIDS also made it clear that this is only for a small number of AIDS patients who insist on treatment, while other HIV carriers must comply with relevant safety regulations.

Effective treatment can replace condoms, but to prevent viral infection, three conditions must first be met: the virus in the blood is suppressed, and the blood no longer contains the virus at least 6 months ago; the patient must persist in treatment , and check regularly; virus carriers must ensure that they have no other infectious sexually transmitted diseases.

Whether the virus in an AIDS patient can be transmitted to others must be verified by the treating doctor. It is speculated that there are only about 1,000 people in Switzerland who truly meet these three conditions, which is equivalent to 1/6 of the total number of AIDS patients in Switzerland.

This is undoubtedly good news for these "relieved" patients, which can improve their quality of life. They can also have children without worrying about their children being infected with HIV. After this so-called "antiretroviral" (antiretroviral) treatment, the life span of an AIDS patient can be exactly the same as that of an ordinary person.

Pietro Vernazza, head of the Swiss Federal Commission on AIDS and professor at the University of St. Gallen, explained: “Research results on infectious diseases over the years have shown that HIV infection is related to the concentration of the virus in the blood. And after anti- With retrovirus (enzyme) treatment, the virus will disappear from the blood.”

Experts said: What is also certain is that after treatment, the virus can even disappear from sexual secretions. Therefore, the possibility of infection among treated patients becomes very small.

This new understanding of AIDS is the result of years of research. One of the surveys was conducted in Spain, where 393 couples in which one partner was living with HIV were followed for 14 years, providing valuable material for this study.

Previously, the University of Lausanne in Switzerland and American scientists jointly discovered that 2% of people are naturally resistant to HIV. Researchers conducted studies on people infected with HIV and found that three genes in the human body play a decisive role in this self-protection function.

Among people infected with HIV, different people's body tissues respond to the virus in different ways. Some people have complete control of HIV in their bodies, while others quickly develop AIDS and die soon after. The researchers concluded that resistance to AIDS is genetically related. After analyzing millions of data, researchers have identified the types of DNA within the human body that play a decisive role in resisting HIV.

Vernazza said that Switzerland is at the forefront of the world in understanding AIDS.