This document discusses how to unleash an "ideavirus" by spreading powerful new ideas quickly and widely. It explains that ideas can now spread like viruses through word-of-mouth marketing aided by digital technologies. Certain people called "sneezer" help spread ideas widely. The document outlines eight variables that influence how quickly an idea spreads, including the type of sneezers promoting it, the medium used, how smooth the experience is, and whether it is amplified by other influencers. It provides tips for marketers on how to leverage sneezers, make the idea spread more smoothly, and launch ideas in a way that allows them to spread virally. The overarching message is that ideas can now propagate through social