AIDS was more than a decade of unrecognized
In 1981 an enigmatic previously immunodeficiency was first described by researchers, had the AIDS virus is already about twelve years undetected distributed in the U.S..
The high genetic flexibility of the virus is the biggest hurdle in vaccine development. Photo: RKI 30/10/2007 - Probably the AIDS virus by the year 1966 reached around from Africa to Haiti in 1969 and finally in the USA.Michael Worobey of the University of Arizona (Tucson, Arizona U.S. government) and his staff had virus samples the first known AIDS patients from Haiti analyzed and compared with several samples from Africa, America and the rest of the world. From this they created a distribution map for the virus . The scientists studied the AIDS virus 1 major group M subtype B. This is the first AIDS virus was discovered and in all Countries outside sub-Saharan Africa dominates. Previous research had already shown that this type of virus was created around 1930 in Central Africa.
Africa, Haiti and then around the whole WeltDie analysis of genetic data now showed that the virus is most likely initially within Haiti and from there spread to the world. Almost as a "seed virus" caused the Haiti-type virus epidemics in other places, such as in Trinidad and Tobago. So far, experts have assumed that the virus arrived in the late 1970s to have entered North Americans to the island state. The present studies show, however, that Haiti is the origin of the local epidemic-type virus, the researchers write by Worobey.
proliferation was first in the heterosexual BevölkerungIn the U.S., the virus spread may initially slow in the heterosexual population, before it reached the high-risk group of homosexual men who suspect Forscher.Dort it had then become so strong that it finally noticed was. Due to the now more 40-year history of the virus in Haiti where a high genetic diversity was found, which is important for vaccine research are published könne.Ihre analysis, the researchers in the "Proceedings of the National Academy of Sciences (PNAS).
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