Nurses tend students after they are admitted to hospital following a chlorine hydride leak from a local chemical company in Yangquan, North China's Shanxi Province October 23, 2006. Eighty-four patients, including 71 students and 13 adults were rushed to local hospital for emergency treatment after developing symptoms of dizziness, nausea and breathing difficulty. All are in critical condition, according to media reports. Human error is to blame for the accident. [Newsphoto]

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