Pursuing that goal starts the four-step cycle again. This is the pattern. The crucial thing is to never stop thinking and working—and never do what we did with malaria and tuberculosis in the 20th century—which is to surrender toplexity and quit.
The final step—after seeing the problem and finding an approach—is to measure the impact of your work and share your successes and failures so that others learn from your efforts.
You have to have the statistics, of course. You have to be able to show that a program is vaccinating millions more children. You have to be able to show a decline in the number of children dying from these diseases. This is essential not just to improve the program, but also to help draw more investment from business and government.