1797 · Diasporayear only
A refugee from Saint-Domingue blames Philadelphia's wharves for the fever
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Yellow fever killed three thousand five hundred or more people in Philadelphia in 1797. Most physicians who could leave the city did leave. One who stayed was Felix Pascalis, who had arrived in the United States in 1793 as a refugee from the Caribbean and had treated fever patients at Benjamin Rush's house on Walnut Street during the epidemic of that year. His book on the 1797 outbreak argued against the common opinion that the disease had been carried in on human bodies aboard ships from Saint-Domingue. He allowed that ships brought it, and held that it moved through wood and air rather than from person to person, rising as putrid exhalations from the timber wharves along the city's two rivers as they dried out. His recommendation was to replace the wharves with stone and coat the stone with tar once a year. The theory was wrong. The habit of plotting cases against places became part of epidemiology.