For the past 20 years, scientists around the world have been confronting one of the greatest medical challenges in human history: the search for an AIDS vaccine. Like detectives on the trail of a ruthless serial killer, determined researchers relentlessly pursue the elusive HIV virus, trying to unlock its lethal secrets. Along the way, they uncover promising leads, gaining critical insights into how to immunize the public against the deadliest virus known to man. But so far, the defiant micro ...[Read Story ]