This article explores solidarity as an ethical concept underpinning rules in the global health context. First, it considers the theoretical conceptualisation of the value and some specific duties it supports (ie: its expression in the broadest sense and its derivative action-guiding duties). Second, it considers the manifestation of solidarity in two international regulatory instruments. It concludes that, although solidarity is represented in these instruments, it is often incidental. This fact, their emphasis on other values and their internal weaknesses diminishes the (...) action-guiding impact of the solidarity rules. The global health and human subject research scene needs a completely new instrument specifically directed at means by which solidarity can be achieved, and a reformed infrastructure dedicated to realising that value. (shrink)