Hans Holbien's Totentanz, the Dance of Death, swept Europe like some sort of plague in the 1500s. It, of course, was hiding a secret truth that the Illuminated Masters of Europe wished to keep from the common man - not all plague victims were taken by disease.
Some were taken by things not of this Earth. They showed me the process during a recent encounter and I have recreated it for you. Family legend says it that child would have been a problem anyways.