Figure 2. Day 10 of Smallpox in a 34-Year-Old Man.

The patient, an immigrant, had been successfully vaccinated in infancy, and a scar is visible on his left arm (arrow). He was described as "well" on discharge two weeks later. Photograph and data are from the clinical records of the Southampton Street smallpox hospital.⁴ Photograph provided courtesy of the Boston Medical Library in the Francis A. Countway Library of Medicine.