Researchers say they have a new vaccine helps to prevent HIV infection. It is being hailed as a landmark moment, especially after recent failures led many scientists to think such a vaccine might never be possible.
It is regarded as a major breakthrough in the fight against HIV and AIDS. Researchers in Thailand say an experimental vaccine they have created cuts the risk of becoming infected with the disease by more than 31 percent.
"In the international scientific and medical communities around the globe, this trial will be recognized as a testament to Thailand's ability to successfully execute a complicated vaccine trial, the largest ever attempted, that ended with a credible conclusion, and that brought us one step closer to an HIV vaccine," explained U.S. Ambassador Eric G. John.
It was the world's largest aids vaccine trial ever conducted. The study followed 16,000 heterosexual volunteers who had no special risk of AIDS infection.
The United States Army, which helped to lead the study, says the benefit of the vaccine is modest, but it is the first evidence that a safe and effective preventive vaccine could be possible.
Researchers say while they are surprised and very pleased with the results of the vaccine, they warn more research is needed.