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VOA常速英语2008年-US Lab Pursues Vaccine to Fight Malaria_在线英语听力室
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VOA常速英语2008年-US Lab Pursues Vaccine to Fight Malaria

时间：2008-02-25 06:02:12

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By Alex Villarreal
Washington
22 February 2008
 

President Bush has wrapped up a tour of sub-Saharan Africa, where he focused on malaria1 and other health issues on the continent. Most health experts say controlling the disease requires many approaches. VOA's Alex Villarreal reports on what researchers consider a promising2 new effort.


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