John Waller wrote a book about this 9 years ago which I thought was amazing:
https://iconbooks.com/ib-title/a-time-to-dance-a-time-to-die...
I don't know if anything new has come to light though.
A particular touching thing was that they made red shoes for the dancers, a known expensive colour, to show how much they valued them, but it didn't stop the dancing.
The film the Red Shoes was based on HC Anderson's story, which as far as I can tell has no connection with this dancing epidemic, just that his Dad was a shoe maker and had some spare red material...