Co-Chair of the Bill and Melinda Gates Foundation Bill Gates calls on Prime Minister Muhammad Shehbaz Sharif on the sidelines of the 77th Session of UNGA. APP60-220922 New York: September 22 - Co-Chair of the Bill and Melinda Gates Foundation Bill Gates calls on Prime Minister Muhammad Shehbaz Sharif on the sidelines of the 77th Session of UNGA. APP APP60-220922 New York: