Writing in the Bill & Melinda Gates Foundation’s “Impatient Optimists” blog, foundation co-chair Bill Gates recounts his recent trip to Ghana, where he “got to watch an effective health system in action — from the decision makers at the national level to nurses who live and work in the villages.” He writes, “There is a lot to learn from Ghana’s successes — but the most important in my mind is that countries need to have a really strong primary health care system that includes immunization as well as maternal and child health, malaria treatment and prevention, and other things that protect children and their families” (3/29).