The Microsoft co-founder is accelerating his plan as the U.S. and other countries cut funding for global health. In addition, Warren Buffett has said his donations to the Gates Foundation would end with his death.

Bill Gates, once the richest man in the world, vowed Thursday to give away "virtually all" of his wealth through the Gates Foundation over the next two decades. Then, the foundation will close its doors on Dec.

Bill Gates will give away $200 billion --- nearly all of his wealth --- over the next two decades through the Gates Foundation.