A nurse checks on medical instruments next to a copper bed rail at the Copper Hospital in Calama city, north of Santiago, March 31, 2011. A clinical trial at the Intensive Care Unit of the Copper Hospital in the mining city, which uses copper applications such as bed rails, bedside tables, handrests and IV drip stands, has showed that anti-bacterial copper quality on copper surfaces killed up to 92 percent of bacteria, according to Copper Hospital. REUTERS/Ivan AlvaradoReuters - As Chile struggled for two months to rescue 33 miners trapped deep underground last year, it turned to an unlikely tool to help keep them healthy: copper socks.


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