According to the author, Doug MacGowan, the dancing plague of 1518 affected 400 people in Strasbourg, France. One theory that explains this according to the author is;
The dancing plague of 1518 started with a woman who began dancing. Next, others in the community began dancing like her. They danced without music till some of them became exhausted and died.
One of the postulations given by the author is that they might have suffered from hysteria.
This is a situation where a person believes that he has been struck with a sickness similar to that of another. It occurs when the community is under stress like famine.
Summarily, mass hysteria was one explanation given by the author to explain the plague.
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