French researchers reported Sunday that an AIDS vaccine designed to treat the disease, rather than prevent it, has scored an initial success by suppressing the virus for up to a year among a small group of patients who tried it.
Although the technique is cumbersome and costly, the experiment published in an online version of the British journal Nature Medicine is being touted as "the first demonstration of an efficient therapeutic vaccine against AIDS."
The vaccine was tested in Brazil on 18 volunteers who were already infected with HIV, the virus that causes AIDS, but who were not yet taking any antiviral drugs. After four months, the level of HIV in their bloodstreams had been reduced an average of 80 percent.
By the end of one year, eight patients in the group had maintained a 90 percent reduction in virus particles in their bloodstream. Four of those patients had virus levels so low that they were comparable to so-called "long- term non-progressors," a rare cohort of people infected with HIV who never seem to get sick.
http://sfgate.com/cgi-bin/article.cgi?file=/c/a/2004/11/29/MNGQ4A35T11.DTL&type=printable