The AIDS virus invaded the United States in about 1969 from Haiti, carried most likely by a single infected immigrant who set the stage for it to sweep the world in a tragic epidemic, scientists said on Monday. Michael Worobey, a University of Arizona evolutionary biologist, said the 1969 U.S. entry date is earlier than some experts had believed. While AIDS was first identified in 1981, Worobey says that the virus infected people first in 1969, and went unidentified until 1981. By examining stored blood samples from HIV patients who died early in the epidemic, researchers believe that a single Haitian immigrant brought the virus to the US, through either New York of Miami, having himself been infected somewhere in Africa 2 to 3 years before coming to the US. The study was published in the journal Proceedings of the National Academy of Sciences
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"I had a hep b vaccine and meningitis vaccine two days before a possible exposure to HIV. I got tested 4 and 8 weeks after possible exposure and they came back negative. Is there any possible way these vaccines could hinder the results of the HIV test."
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