An overlooked history of Southeast Asia’s varied healthcare regimes during the Cold War. For far too long, Southeast Asia has been treated as a static backdrop for the exploits and discoveries of Western biomedical doctors. Yet, Southeast Asians have been vital to the significant developments in the prevention and treatment of diseases that have taken place in the region and beyond. Many of the institutions and people that shaped subsequent responses to outbreaks, epidemics, and pandemics first began their work in Southeast Asia during the Cold War. The diversity of approaches to health and medicine during that era also reminds us of the possibilities, and limits, of human intervention in the face of political, social, economic, and microbial realities. The people and places of Southeast Asia have provided clinical trials for different health regimes. Fighting for Health highlights new perspectives and methods that have evolved from research presented at regional conferences, including the History of Medicine in Southeast Asia (HOMSEA) series. These insights serve to challenge dominant models of the medical humanities.