The spread of an infectious disease from its country of origin is a complicated process involving many factors, but at its core, it is related to the movement of people. There are several parameters that can be used to coarsely estimate movement: travel (inbound and outbound), migration, trade and proximity. Looking at the number of COVID-19 cases in the context of the ranked order of flow of people and goods between China other countries, we see the following (as of March 15):
Read the whole article on http://theconversation.com/why-are-there-so-few-coronavirus-cases-in-russia-and-africa-133591
