Lately, there has been much talk and action in Washington, DC, regarding healthcare reform, and, thankfully, some of the reform talk has focused on prevention and proactive intervention. While we care about healthcare coverage, which is the main thrust of the federal debate, prevention can be the key to reforming the health of the San Diego community. To see the possibilities for transforming the health of all San Diegans, one need only examine these three numbers: three, four, and 50.