Bill Gates, philanthropist and co-founder of Microsoft, participates in a session titled "Investing in Prevention and Resilient Health Systems," in September 2015.
Bill Gates, philanthropist and co-founder of Microsoft, participates in a session titled "Investing in Prevention and Resilient Health Systems," in September 2015. Mark Lennihan / AP
Bill Gates, philanthropist and co-founder of Microsoft, participates in a session titled "Investing in Prevention and Resilient Health Systems," in September 2015. Mark Lennihan / AP