A gene in physical space is like a meme in cognitive space. Watch the virus gene to figure out how a meme works. see Richard Dawkins, The Selfish Gene. It also explains the power of the printernet.
Update: Thursday 10:28 AM EST
Notice that the number of cases reported are tiny. Negligible if you don't focus. But they are emerging everywhere on the planet. Today it seems there might be one case in Spain. As soon as a case appears in Europe, the WHO warning signal goes to the next level. Notice who the WHO is scanning for early signals and amplifying that signal to health ministries around the world so they can start organizing the feet on the ground to manage the wave.