Bronchitis is one of those conditions that can leave you feeling miserable—coughing, struggling to breathe, and just generally unwell. But when it comes to how contagious it is, it can be a bit confusing. Is it something you can catch from others, or is it only something that happens when your body reacts to other factors, like smoke or pollution? Let’s break it down and figure out what you need to know about the contagion. And how to avoid spreading or catching it.