Carey was a Philadelphia publisher and economist rather than a physician. In this little book, which passed through four editions in a few months, Carey left a graphic description of the great yellow fever epidemic of Philadelphia in 1793, which infected about 17,000 people and left 5000 people dead, out of a population estimated at 45,000-50,000. Carey gave a good clinical description of the disease, mentioning the efficacy and the failure of many forms of treatment. Regrettably Carey accused blacks of causing the epidemic and of taking advantage of victims while acting as nurses. Wide distribution of the pamphlet contributed to fears and hostility in the city in which members of the Free African Society had risked their lives as nurses and aides to the sick and dying. Digital facsimile of the third edition, 1793, from the Internet Archive at this link.
To the fourth edition of January 16, 1794 Carey appended the following: "Acounts of the plague in London and Marseilles; and a list of the dead, from August 1, to the middle of December, 1793." Digital facsimile of the 4th edition from the Internet Archive at this link.