A three-year-old child, battling blood cancer, allegedly died at AIIMS Bhopal after a nurse injected formalin into his body instead of medicine. The chemical, toxic for humans, is used to preserve biopsy samples, tissues and bodies. The incident took place in December 2025. A criminal case has been filed in connection with the fatal mistake. The child, Sarthak Yadav, was a resident of Kaurja village in Bina tehsil of Sagar district. He was admitted to the paediatric ward of AIIMS Bhopal on December 15, 2025, in a critical condition. His family says he was undergoing treatment for blood cancer and was under constant medical supervision.