We go inside Blueprint Health, a health-tech accelerator in New York City, to meet some of the entrepreneurs working to give health care a digital upgrade. Venture-capital dollars have been flowing into the sector in recent years. Wendy Nguyen is the co-founder of HealthyOut, an app that helps people make healthy dining choices. Tim Soo, who co-founded Meddik, uses the collective wisdom of crowds to provide a new way to search for health-care information on the web. We also meet Seth Freedman, co-founder of intelligentM, which aims to cut down on hospital-caught infections through smart tags.