“Is it gonna be poop or is it gonna be barf?” It’s the question we all fear during a bout of food poisoning when time is of the essence and a decision has to be made before it’s made for us. Often, the germ forcing this question upon us is none other than the dreaded norovirus. First called “winter vomiting disease” for reasons obvious to anyone who has been unfortunate enough to become infected, norovirus now conjures up images of puking passengers aboard cruise ships or oysters on the half shell secretly harboring a vomiting virus. In this episode, we delve into the world of norovirus, examining what qualities make it spread so rapidly and sicken us so quickly. Our tour of norovirus history takes us down some surprising roads, where we meet Vomiting Larry and chat about vulture vomit. We round out the episode by looking at norovirus by the numbers, dispelling the notion that norovirus can only be found aboard cruise ships. Spoilers: it’s everywhere.