Most scientists involved in Aids research believe that a vaccine against HIV is further away than ever and some have admitted that effective immunisation against the virus may never be possible, according to an unprecedented poll conducted by The Independent.
A mood of deep pessimism has spread among the international community of Aids scientists after the failure of a trial of a promising vaccine at the end of last year. It just was the latest in a series of setbacks in the 25-year struggle to develop an HIV vaccine.
The Independent's survey of more than 35 leading Aids scientists in Britain and the United States found that just two were now more optimistic about the prospects for an HIV vaccine than they were a year ago; only four said they were more optimistic now than they were five years ago.
Nearly two thirds believed that an HIV vaccine will not be developed within the next 10 years and some of them said that it may take at least 20 more years of research before a vaccine can be used to protect people either from infection or the onset of Aids.
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