Denis Chopera: Why do HIV vaccine trials keep failing?

Better pre-clinical research would prevent  the  spending of hundreds of millions on  HIV vaccines that have little hope of efficacy, says

Another promising HIV vaccine has failed in clinical trials. The outcome was described as a major blow to millions who hoped researchers were finally approaching a long-term solution to the AIDS epidemic. File Picture: Red AIDS ribbon.

Yet another seemingly promising HIV vaccine has failed in clinical trials. 

According to Anthony Fauci, the head of the National Institute of Allergy and Infectious Diseases at the United States National Institutes of Health, which was conducting the trial, a vaccine is “essential to end the global pandemic.”