Ebola patients may show no symptoms at all: study

More than a dozen people in Sierra Leone were infected with Ebola but showed no symptoms, suggesting that the massive and deadly West Africa epidemic was larger than previously thought, researchers said Tuesday. The findings by a team of scientists at Stanford University offer new evidence to support previous theories that the hemorrhagic fever, Ebola, may not always cause severe illness including bleeding, vomiting, diarrhea and fever. Some 28,000 people were infected with Ebola in the outbreak which began in late 2013 and continued through last year, killing more than 11,000 people mainly in Guinea, Sierra Leone and Liberia.

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