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Experimental Malaria Vaccine Weakens Parasite

Scientists are developing a vaccine against malaria that is designed to limit the illness in children who have been bitten by mosquitoes carrying the disease-causing organism.  They have discovered a protein that is essential for malaria parasites to cause severe illness. With the protein, called SEA, the parasite is able to burst through infected red blood cells, ramping up disease symptoms. But malaria parasites deprived of SEA are trapped inside the cells where they wither away...

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