A nuclear accident in Japan exposed a worker to radiation levels rarely seen in human history. His name was Hisashi Ouchi. At a uranium processing plant in Tokaimura in 1999, a criticality accident released intense radiation. Ouchi was standing closest. Within seconds, his body absorbed a dose so high that it began damaging him at a cellular level. His DNA was destroyed. His body could no longer repair itself. Doctors transferred him to a Tokyo hospital and began aggressive treatment, trying everything possible to keep him alive. Over the next 83 days, his condition deteriorated as his immune system collapsed and his organs gradually failed. The case pushed the limits of medical science. But it also raised difficult questions — about how far treatment should go when recovery may no longer be possible.

A nuclear accident in Japan exposed a worker to radiation levels rarely seen in human history. His name was Hisashi Ouchi. At a uranium processing plant in Tokaimura in 1999, a criticality accident released intense radiation. Ouchi was standing closest. Within seconds, his body absorbed a dose so high that it began damaging him at a cellular level. His DNA was destroyed. His body could no longer repair itself. Doctors transferred him to a Tokyo hospital and began aggressive treatment, trying everything possible to keep him alive. Over the next 83 days, his condition deteriorated as his immune system collapsed and his organs gradually failed. The case pushed the limits of medical science. But it also raised difficult questions — about how far treatment should go when recovery may no longer be possible.