FILE - Two children stricken down with malaria rest at the local hospital in the small village of Walikale, Congo, in this Sunday, Sept. 19, 2010 file photo. Malaria is spread by

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FILE - Two children stricken down with malaria rest at the local hospital in the small village of Walikale, Congo, in this Sunday, Sept. 19, 2010 file photo. Malaria is spread by mosquitoes and kills more than 650,000 people every year, mostly young children and pregnant women in Africa. An experimental malaria vaccine developed by GlaxoSmithKline and the PATH Malaria Vaccine Initiative, helped develop a new experimental malaria vaccine which was thought promising but is now turning out to be a disappointment, with a new study showing it is only about 30 percent effective at protecting infants from the killer disease according to results released in South Africa Friday Nov. 9, 2012. (AP Photo/Schalk van Zuydam, file) less