In the host and the environment under the Comprehensive 28-year life cycle of human AIDS virus, its the reorganization of the increasing variation of "reckless." In yesterday's Shanghai science major stresses on the second forum, the Shanghai disease Prevention and Control Center to life, Culture and Sport, Professor Miriam said, at present, HIV variation in the global restructuring of up to more than 40 kinds of subtypes, most of which have distribution in China this to the clinical diagnosis of AIDS and vaccine has brought quite difficult to develop.

variation has been the law of the survival of the virus, the risks of HIV is no exception. Distribution of National HIV survey shows that in 1996 -1998 years, accounting for a single subtype of HIV type more than half of the reorganization of variation less subtype; to the years 2001 -2003, the proportion of a single subtype to 29.1 percent, while the recombinant subtype variation as high as 50.2%

to accelerate the restructuring of the mutation and route of transmission of HIV infection is closely related to the change. Kang Lai pointed out that currently, China's new AIDS cases made to the main sexually transmitted infection ratio increased year by year. Condition, according to the National AIDS sentinel surveillance showed that in 1985 -2005 in 20 years, sexually transmitted infections in the total number of AIDS cases in less than 10%; last year, this figure rises to 45.8%. Among them, the men gay who is becoming infected can not be ignored in high-risk groups.

virus resistance have been manifested. The national rate of HIV drug resistance monitoring shows that the years 2004 -2005, early and late first-line treatment of drug-resistant rates were 20.9% and 1.6%; in 2006 -2007, the two treatment resistance rate rose to 25.7% and 9.2%. Interestingly, different drugs have actually occurred between the cross-infection. For example, the TDF called AIDS drug treatment object has not yet been used in China, has been demonstrated in the laboratory a 10.2% rate of high resistance.

"virus without passports, but also do not need a visa, they can travel around the country, around the world." Kang Lai-yee humorous words intended to convey to the audience the fact that a severe - the floating population will become a bridge for the spread of AIDS groups and long-term widespread popular factors. In this regard, to Miriam, Culture and Sport has repeatedly stressed the importance of international cooperation. "So far, smallpox is the only human infectious disease eradication. Vaccinia story tells us that the fight against infectious diseases needs the joint efforts of all countries in the world. "