A few months ago, Ethan Linenberger was just a teenager with a Reddit account. He used that account to find out how to get himself vaccinated, and now he is one of the youngest--and smartest--vaccine advocates around. We talked to him about vaccines, social media, and how teens can engage in this space.Find Ethan at his website to learn more about what he has done: https://www.adolescentadvocate.com/