Beginning in 1485, a mysterious disease swept in waves across England. No one was sure how it spread, no treatment existed, and the disease took the name of its most memorable symptom. The English sweating sickness seemed to have a taste for the wealthy, and the bulk of fatalities were English. The last widespread outbreak of sweating sickness was reported in 1551 -- after that, the disease vanished. Along the way, it made a king of Henry VIII.