Preliminary results from the AIDSVAX trial in Thailand show it does not work, say its makers VaxGen. Those given the vaccine were no less likely to contract HIV, and the jab did not slow the progress of the disease. Another vaccine fails. And certainly dozens of others will also fail before scientists come up with one that works that doesn't carry a risk of actually infecting the person being vaccinated. HIV mutates like mad, too... Even if a successful vaccine is found, will it protect against all strains? will the virus be able to mutate around it? And once there is a successful vaccine, will we see a return to 70's-style promiscuity? HIV vaccine trial ends in failure | 
