Keeping Up with the Gateses; On a whirlwind tour through South Asia, 'the benefactors' show that when it comes to health, they mean business: U.S. Edition Edition

For the Gateses, this is not a do-gooder hobby. Since launching the [Bill] [Melinda Gates] Foundation in 2000, the couple has transformed the field of global health, pushing diseases of poverty into the spotlight and reviving disciplines that range from parasitology to vaccine science. It helps to have $30 billion in assets, of course, but enormity isn't the only thing that distinguishes this enterprise.