…The therapeutic vaccine, a shot that treats an existing disease rather than preventing it, was safe and led to a dramatic drop in the amount of the virus detected in some patients, said the study, published in Science Translation Medicine.
After 12 weeks of the trial, the HIV viral load dropped by more than 90% among 12 of the 22 patients who received the vaccine. Only one among the 11 patients who received a control injection without the vaccine experienced a similar result.
After 24 weeks, the effectiveness had begun to decline, however, with seven of the 20 remaining patients receiving the vaccine enjoying a similar 90% slump in viral load. No one in the control group of 10 patients experienced such a decline in the virus.