Bill Gates, 2017: "In every part of the world, people are living longer than they used to. The longer you live, the more likely you are to develop a chronic condition. Of all the diseases that plague us late in life, one stands out as a particularly big threat to society: Alzheimer’s disease. Bill Gates has spent considerable time over the last year learning about the disease and the progress made to date.

Bill Gates, 2017: "In every part of the world, people are living longer than they used to. The longer you live, the more likely you are to develop a chronic condition. Of all the diseases that plague us late in life, one stands out as a particularly big threat to society: Alzheimer’s disease. Bill Gates has spent considerable time over the last year learning about the disease and the progress made to date.