U.S. troops set up at first Ebola field hospital in Liberia and start with a barbed wire perimeter

Is that fence to keep people out or the patients in?

American troops have arrived at Ebola’s ground zero in Liberia in a bid to battle the outbreak in the country hardest hit by the deadly disease.

Poor infrastructure, difficulties with equipment and torrential rains slowed the U.S. military’s initial response, but by Monday afternoon U.S. soldiers had started to erect barbed wire around what will be one of almost 20 treatment centers.

It isn’t immediately clear if the fence is to help protect the camp from possible looters or to prevent sick patients escaping.

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