The word “viral” comes from the fact that digital things spread across the internet in the same way that actual viruses spread through groups of people in real life. Therefore, by understanding how real viruses are “designed” to get the job done, you can make your designs more “viral” as well.
Epidemiologists, who study viruses, measure two key things (among many others) to give them a sense of how a virus is spreading and behaving. Today we will learn the first one:
Incidence Rate
