Shots in the Dark

<p>When scientists proved in 1984 that HIV causes AIDS a vaccine race spun into action. But the sprint to develop an AIDS vaccine now more closely resembles a crawl. Jon Cohen elucidates the forces that have hindered the search: unforeseen scientific obstacles clashing personalities the uncertain marketplace haphazard political organization and serious ethical dilemmas. Beyond a powerful critique Cohen also offers specific recommendations for accelerating the effort.</p>