Earlier quoted context omitted.
Malaria deaths have fallen by 60% in the last 15 years, saving on the order of 12 million lives. Bill's foundation has donated around $4B to the cause. And yeah, it's got Melinda's name on it, but let's face it, virtually all the money is from Bill/Microsoft.
But much of the motivation for starting a foundation is from Melinda.
Where one side provided all the money, the other side provided the direction.
Both were necessary. Weird huh?