Did you know the "Rosie" was deadly?

Excuse my ignorance if I may be a little late but did you know that the lovely melody "Ring around the Rosy" is pertinent to the Bubonic Plague of 1665?

"Ring around the Rosy" refers to the rosy red rash that formed a ring shape on the victims' skins while "Ashes Ashes" referred to the cremation of their bodies after death. James Leasor made this connection in his book The Plague and the Fire (1961).