I always understood the nursery rhyme “Ring o’ roses” to be about the Plague…
“Ring-a-ring o’ roses,
A pocket full of posies,
A-tishoo! A-tishoo!
We all fall down.”
The “roses” were s’posed to refer to the boils caused by the Black Death; the sweet-smelling “posies” either blocked the disease in the air or simply masked the smell of lots of dead people; “a-tisho” because if you had the Plague you used to sneeze lots; and “all fall down” is kinda obvious…
The Snopes site also comes down on the skeptical side of this children’s nursery rhyme having anything to do with the Plauge. Most compelling is that the rhyme didn’t originate until hundreds of years after the Plauge happened, and appears to have had dozens of different regional variations, most of which cannot be linked even tenously to the plauge. I think it’s just a case of people trying to force links on things which have nothing to do with each other.