Susan Sontag said this quote

One feature of the usual script for plague: the disease invariably comes from somewhere else. The names for syphilis, when it began its epidemic sweep through Europe in the last decade of the fifteenth century are an exemplary illustration of the need to make a dreaded disease foreign. It was the French pox to the English, morbus Germanicus to the Parisians, the Naples sickness to the Florentines, the Chinese disease to the Japanese. But what may seem like a joke about the inevitability of chauvinism reveals a more important truth: that there is a link between imagining disease and imagining foreignness.