In his post, Adrian Di Giovanni drew our attention to the notion of Do No Harm, focusing on the context of humanitarian assistance. He observes the increase in relying on or at least mentioning this concept on the international level and rightly asks the question what the meaning could be in a more specific sense. I would like to add to the understanding of Do No Harm in international law from a systematic point as well as with regard to its content in the particular context of humanitarian assistance.