Researchers from around the world have been working for more than two decades to create a preventative vaccine that will protect the world’s population against HIV infection. Here in the United States, the National Institute of Allergy and Infectious Diseases (NIAID) at NIH has enrolled more than 28,000 volunteers in more than many HIV vaccine clinical trials to test 70 different possible vaccines. In addition, both the CDC and US Military HIV Research Program are actively engaged in vaccine research. In 2009, researchers published findings from an HIV vaccine trial in Thailand showing that a combination vaccine was safe and lowered the rate of HIV infection by 31.2 percent.
As of now, there is no vaccine available for HIV and AIDS. Scientists are expanding upon the results from the Thai trial in an effort to make a vaccine with even greater effectiveness. Until that time, the world anxiously awaits a preventative HIV vaccine.
https://www.empowher.com/aids-hiv/content/scientists-work-towards-hivaids-vaccine