From Jeremy Hsu:
A child’s death from scarlet fever wouldn’t have raised any eyebrows during the devastating epidemics that swept Europe and North America in the 1800s. But Samuel Gee, a highly regarded physician in England, found something very strange while cutting open the corpse of a seven-year-old boy in London in 1870. Gee’s autopsy findings, preserved in a single paragraph written in 1871, recorded signs of damage called aneurysms in the coronary arteries running across the surface of the boy’s heart. In the affected regions, the main blood vessels that supply blood to the heart had expanded like modeling balloons because of weakened vessel walls.