Probable Cause Of HIV Vaccine Failure

The recent failure of an HIV vaccine was probably caused by the immune system reacting to the virus ’shell’ used to transmit the therapy around the body, according to research published 16 November 2009 in the Proceedings of the National Academy of Sciences. The trial, called ‘STEP’, was halted in September 2007 because preliminary results suggested that people who had been given the vaccine were more likely to be infected with HIV than people who had been given a placebo.

Source: Probable Cause Of HIV Vaccine Failure