This article is for everyone who tries to will themselves invisible at the mention of blockchain. Imagine you’re admitted to the hospital for an emergency surgery following a freak selfie accident while on vacation on the other side of the world. Right now, there’s no way for doctors to know your full medical history, allergies, or current medications: All that information is stored in silos that you can’t access from the outside. But what if your medical records were all connected and immediately accessible—while still being totally private?