Fares's research entails neuroscience, neurosurgery, conflict medicine and global health.[1] In Lebanon, he explored injuries resulting from cluster munitions, which are bombs that release lots of smaller submunitions, to highlight the effects of these weapons on humanitarian and ecological levels.[2] During the 2006 Lebanon War, it was estimated that 4.6 million submunitions were released over Lebanese soil, and almost one million of which remained unexploded.[10][12] These unexploded bombs continued to injure and kill civilians after the war ended.[4][13] Fares studied cases of amputations and injuries involving multiple regions of the body due to blast explosions.[4][10][13][14][15][16][17] These injuries often led to disability,[13][14] and significant social and mental health problems.[10][18] His research led to the “Fares Scale of Injuries due to Cluster Munitions” that assesses injuries based on functional impairment.[10][11][10][14] The scale helped better classify the wounds of victims and determine the best possible treatment.[1][8][10][14]