Gates said one of his biggest strategies is to find ways to make big dents in infectious disease. He said there's "lots of low-hanging fruit out there," for which "there just hasn't been that much work done."

Pick a disease that robs millions of people of their lives or livelihoods, and if a given intervention can go a long way toward reducing that suffering, chances are Gates classifies it as "promising."

When it comes to malaria, for example, he told moderator Dr. Sanjay Gupta the current process is to run in-house human challenge trials. That means people can volunteer to take an intervention, typically some kind of tablet or pill, get bitten by a mosquito with malaria, and see if they get infected.

Read the full article on Bill Gates by Chris Weller at Business Insider