Poland 2011 Cystic Fibrosis Week

28 February is Rare Disease Day in Poland, and for this day in 2011, a stamp was released marking Cystic Fibrosis Week. The stamp features the face of a boy, half in colour, the other half in grey scale, probably representing good health and poor health. The first day postmark features the double helical represenation of DNA structure, and the left side of the cover is illustrated with the human chromosome 7 with the region q31.2 marked in red - location of the CFTR (cystic fibrosis transmembrane conductance regulator) gene. Mutation of this gene leads to the development of cystic fibrosis.