HIV live vaccine strategy?

[Hoan Phan]

How successful is the live vaccine strategy for HIV? How promising is it?
And so far what virus has been used as vector - the two I heard of are
vaccina and herpes (cold) virus? Thanks in advance for any info.

-- 
       Anh Hu`ng na(`m xo' bu.i tre,
 ruo^`i bu kie^'n ddo^? cu~ng khoe anh hu`ng.
   DDa^`u cha.m tro+`i cha^n dda.p dda^'t,
ddu+'ng dda'i dda`ng hoa`ng ba^'t sie^ng xe.o.

                                    Hoan Phan