Altitude Sickness Claims 4 Lives On Mount Everest Expedition: What Is It?

Two of those climbers -- a 61-year-old German and a 44-year-old South Korean -- reportedly died of altitude sickness and exhaustion, the International Business Times reported. A Chinese climber and a Canadian born in Nepal were also found dead,The Yonhap news agency, quoting a diplomat in the South Korean embassy in Katmandu, said Song collapsed due to

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