According to the internet (big caveat) there's no record of him actually saying it before it became attributed to him, so I suspect not.
He did however famously get his autobiography amended after he argued the internet was a niche technology that would never amount to much.
To be honest, given the amount of research going into HIV, it wouldn't surprise me at all if we had a vaccine in 15 years. Whether the drug company that perfects it will allow it to be affordable enough to be used where it's actually most needed is another matter.