Abstract
The ethical challenge is squarely focused on the question of what is owed to participants of vaccine trials who happen to become infected during the course of the trial. Not surprisingly, given the prominence of HIV/AIDS in many parts of the developing world, HIV vaccine trials have become the focal point of this debate. It is worth noting from the outset, however, that the same arguments that apply to HIV vaccines would apply to any number of microbicide trials aimed at protecting women against a large variety of sexually transmitted illnesses.1 One of the controversial questions in this debate has been the issue of whether or not an infection acquired by vaccine trial participants during the course of the trial can reasonably be considered a trial related injury that ought to be subject to compensation (in the form of access to good quality AIDS treatments, including antiretrovirals).