World Watch

KAAREL PRINSLOO/AP

At a hospital in Saude Manhiça, Mozambique, a little boy waits his turn to be tested for malaria

Another Silent Killer
MOZAMBIQUE While George W. Bush promoted a $15 billion U.S. program to fight AIDS in Africa, scientists prepared to take a major step toward one of medicine's Holy Grails: a malaria vaccine. This week, at a clinic in the town of Saude Manhiça, north of the capital, Maputo, experts from an international public-private partnership will kick off a large-scale clinical trial — involving 2,000 children, ages 1 to 4 — to test a GlaxoSmithKline drug called RTS,S/ASO2A. It is the most advanced of the 80 malaria-vaccine candidates now in development,...

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