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In fact, a virus emerged in the 1970s that could've been just that fatal.
					出自-2013年6月听力原文
				 
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Named after a river that passes through the Congo, the Ebola virus originally manifested itself in the interior of Africa in
					出自-2013年6月听力原文
				 
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If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic.
					出自-2013年6月听力原文
				 
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However, soon after these fierce outbreaks, the virus died out, at least temporarily
					出自-2013年6月听力原文
				 
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What is Ebola virus named after?
					出自-2013年6月听力原文
				 
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By inhaling air polluted with the virus
					出自-2013年6月听力原文
				 
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More strains will evolve from the Ebola virus.
					出自-2013年6月听力原文