From the 7th to theĀ 17th Century, mainland Europe was home to a peculiar and occasionally fatal condition, dancing mania. It was no disease, no bacteria, no virus. A particularly human condition, a social phenomenon. There are a few known cases, spread widely. It affected thousands of individuals, how and why this happened, unknown.
It really got moving in 1374, the first major outbreak occurred in Aachen, Germany. After that it spread around Europe. The first step of the dancing plague was often an individual. France, 1518, a woman called Frau Troffea took to the warm July air and danced the streets of Strasbourg. This fervent flailing went on for six days, by the end of that 34 other dancers were going toe-to-toe with the fever.
The numbers swelled, as they normally do. By the end of the month there were some 400 dancers on the streets. In the 1518 epidemic local physicians concluded the whole case was the result of ‘hot blood.’ The council even stepped in and attempted to alleviate the condition. The solution to dancing, was more dancing.