"In the meantime, immerse your nose continually in ice cold water."
-- Professor H Spleen (DP3)
Letter appearing on the Problem Page of the Daily Prophet (DP3)
Mr Howland Coopey wrote to the Daily Prophet describing symptoms of green and purple rash coupled with sparks when he sneezed. Professor Helbert Spleen of St. Mungo's Hospital dismissed his fears and advised that the symptoms would clear up by themselves (DP3)
Although Professor Spleen states that Mr Coopey's dragon pox symptoms will disappear on their own, a cure for dragon pox was discovered by Gunhilda of Gorsemoor around the end of the 16th century (FW). Wizards and witches have also died (HBP9, Pm) from cases of Dragon Pox!
While the date printed on DP3 is 1 June 1999, the timeframe for these events is 1992-1993.