But this is an easy point to make, and one already common in the mainstream press: the fact that “globalization” enables the spread of such diseases more quickly—albeit here with an important addition, noting how this very process of circulation also stimulates the virus to mutate more rapidly. The real question, though, comes earlier: prior to circulation enhancing the resilience of such diseases, the basic logic of capital helps to take previously isolated or harmless viral strains and place them in hyper-competitive environments that favor the specific traits which cause epidemics, such as rapid viral lifecycles, the capacity for zoonotic jumping between carrier species, and the capacity to quickly evolve new transmission vectors. These strains tend to stand out precisely because of their virulence. In absolute terms, it seems like developing more virulent strains would have the opposite effect, since killing the host sooner provides less time for the virus to spread. The common cold is a good example of this principle, generally maintaining low levels of intensity that facilitate its widespread distribution through the population. But in certain environments, the opposite logic makes much more sense: when a virus has numerous hosts of the same species in close proximity, and especially when these hosts may already have shortened lifecycles, increased virulence becomes an evolutionary advantage.

— Social Contagion by Chuang (Page 13)