A U.S. citizen quarantined in Ghana suspected of having Ebola has tested negative for the deadly disease. The Ministry of Health said preliminary tests undertaken by the Noguchi Memorial Research Institute proved negative. It said the American, who has not been named, had previously visited Guinea and Sierra Leone - countries where Ebola has killed hundreds. He arrived in Ghana and went to the Nyaho clinic in Accra with a fever. He was then quarantined along with the doctor and two nurses who treated him, Citi News reports. Deadly toll: More than 450 people have died in an Ebola outbreak in West Africa that has raged since February
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More than 450 people have been killed by Ebola, which is 90% lethal
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The unnamed American reportedly visited Guinea and Sierra Leone
The deadly virus has plagued some of @placeholder's most vulnerable natures, like Sierra Leone (pictured).