I have had the chance to listen to the great man on the two occasions when he has come to parliament and explained what his foundation is doing to address poverty, immunisation, vaccination programmes, ebola, and provide international aid.
He is doing amazing work. I warmly recommend his Annual letter - the link to which is set out below:
http://www.gatesnotes.com/2015-annual-letter?page=0&lang=en&WT.mc_id=01_21_2015_AL2015-BG_PT_Img1_Top_20