Precision medicine is a way of treating people who are sick by giving them medicines or treatments that are tailored specifically to them. It takes into account a person's age, environment, lifestyle, and genes - their whole picture, not just one part. For example, if a person has a certain type of cancer, a doctor may be able to use precision medicine to give them a specific treatment that will work best for them, instead of just giving them a generic treatment that might not work as well. The goal is to give people the right treatment at the right time, so they can get better faster.