"I have recently notice a green and purple rash between my toes, coupled with sparks from my nostrils when I sneeze."
-- Howland Coopey (DP3)
Howland Coopey was a wizard whose letter was published on the Problem Page of the Daily Prophet (DP3)
In his letter to the Daily Prophet's Problem Page entitled "I'm Turning Purple" asking for medical advice, Mr Coopey described his distressing symptoms and wondered if they were anything to be concerned about. Professor Spleen responded that it was a simple case of Dragon Pox (DP3)
Other canon notes and references
While the date printed on DP3 is 1 June 1999, the timeframe for these events is 1992-1993.