From what disease did Marie Curie die in 1934?

Marie Curie died in 1934 from aplastic anemia, a serious disorder in which the bone marrow stops producing enough blood cells.

Curie died on 4 July 1934 at the Sancellemoz sanatorium in France, aged 66. Her illness was widely linked to her long-term exposure to ionizing radiation during pioneering research on radioactive substances and her First World War work with mobile X-ray units. At the time, scientists did not yet understand the health risks of prolonged radiation exposure.

Aplastic anemia is not the same as radiation poisoning, lung cancer, or leukemia. Radiation may have contributed to the bone-marrow damage, but aplastic anemia was the recorded disease that caused her death. Curie had also handled radioactive materials without modern shielding, sometimes carrying samples in her pockets and keeping them near her workspace.

Her death came after a career that transformed physics and chemistry. She helped discover polonium and radium, coined the term radioactivity, and became the first person to win Nobel Prizes in two different sciences.