I was able to find fairly good answers by going to www.google.com and typing in words like "AIDS Vaccine".
A lot of research has gone into AIDS vaccines, but people are extremely cautious as they worry about accidentally spreading the disease this way. Using attenuated vaccines is not considered safe with AIDS but subunit vaccines might be OK. There are dozens of websites about this. Try International Aids Vaccine Innitiative.
Certain types of vaccines are more risky than others.
Again I urge you to go to the Google Search Engine when you have questions like this. I typed in "which vaccines are more risky" and very quickly found dozens of links that held the answer.