How to keep high-risk studies ethical: classifying candidate solutions.

This article lays out a wide spectrum of candidate ethical solutions for the challenge on which this JME symposium focuses: the benefit:risk ratio challenge to some early-phase HIV cure and remission studies. These candidate solutions fall into four categories: ones that seek to reduce risks in early-phase HIV cure and remission studies, ones that enhance the benefits for these studies' participants (or show that those were adequate in the first place), ones that focus on participants' free and informed consent to participate and ones according to whom the large benefits to non-participants can defeat considerations about individual participant net risks. In so doing, this article also structures the rest of the symposium.