Bill Gates' 11th anniversary of retirement to focus on charity, what exactly has been done?

Bill Gates retired, will be 58 billion dollars of personal property to the fund named after him and his wife, the money will be used for research on diseases and malaria vaccine research, and to more poor areas of aid and assistance, in 2015, to the international Senegal in Africa, a drinking water purification machine, to help people there to drink clean water.