Here’s how quickly zombies could spread across the United States (http://mattbierbaum.github.io/zombies-usa/). It’s just a quirky model for the spreading of different types of infection, and you can run the simulation for yourself. Think how good it would be if science literacy could spread in the same way! See my Mini Story 34: The Science of Vaccination and the Vaccination of Science (https://lenfisherscience.com/34-the-science-of-vaccination-and-the-vaccination-of-science/)