In 1956, a 5-year-old girl fell mysteriously ill in Japan; doctors soon uncovered a devastating mercury poisoning disaster

On April 21, 1956, a 5-year-old girl was brought to the Chisso Corporation factory hospital in Minamata, Japan, after developing a frightening combination of symptoms. She could barely walk, her speech had become slurred and she was suffering convulsions, leaving doctors unsure what they were dealing with.

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