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Three girls started laughing. . .No joke. No reason. . .They just couldn’t stop....1962.. Tanzania. . .It spread to 95 students… then entire villages. . .The school shut down—until people realized no one was enjoying it..People cried, fainted. . .Even screamed between the laughter. . .Doctors ran every test… and found nothing. . .Not one outsider caught it. . .They just watched..Then one day… it stopped...........No cure. No explanation. . .Scientists blamed stress. .But no one ever proved what