The All of Us Research Program, run by the National Institutes of Health, is working to increase the use of something called precision medicine, which tries to design healthcare in a way that is custom-made for individual people - much like a pair of prescription glasses. To do this, they are studying the health and well-being of people all over the country, who are answering questions about their health, tracking their lifestyle habits, and occasionally giving samples of blood and saliva to help move science forward.