As the novel coronavirus (Covid-19) spread around the world, so did theories, stories, and conspiracy beliefs about it. These theories infected communities from the halls of Congress to Facebook groups, spreading quickly in newspapers, on various social media and between friends. They spurred debate about the origins, treatment options and responses to the virus, creating distrust towards public health workers and suspicion of vaccines. This book examines the most popular Covid-19 theories, connecting current conspiracy beliefs to long-standing fears and urban legends. By examining the vehicles and mechanisms of Covid-19 conspiracy, readers can better understand how theories spread and how to respond to misinformation.