Microsoft founder Bill Gates, his wife Melinda French Gates and British Prime Minister David Cameron at the World Economic Forum on January 28, 2011, in Davos, Switzerland.
Johannes Eisele/AFP/Getty Images
January 31, 2011 Philanthropist Bill Gates says the time is now for the world to redouble efforts to eliminate polio by funding efforts to vaccinate vulnerable people against the disease. An international initiative to wipe out the disease faces a $720 million budget shortfall.
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