In fact, markets have short memories regarding epidemics. Markets may initially react to the uncertainty and fear that comes with any new concern, but, for the most part, viruses get contained and investors return to corporate and economic fundamentals. We can see this pattern in the adjacent table. Market returns generally have been up in the six- and 12-month periods following the outbreak of a virus or disease. While this is a small sample set, we know that keeping focused on the long-term helps us keep a level head during all kinds of storms.