There is a contagion in the markets that is likely worse than the actual coronavirus, and that is fear of the coronavirus. Or at least the unknowns about the disease and its future path. One market advisory warns that global disease issues will define 2020 demand, or at least that is what is being said right now.  Let’s keep with the facts: the coronavirus has a mortality rate right now that is higher than the conventional flu, but far lower than the SARS rate nearly two decades ago. Moreover, its relative rate is declining as the number of known infections has been growing faster than the death rate. Both infection rates and mortality will be lower in rich countries due to better health and control systems. A student at Arizona...