Prevalence
PNH is a rare blood disorder that affects an estimated 8,000 to 10,000 people in North America and Europe and, potentially 1,000 to 2,000 patients in Japan based on a study designed to look at PNH prevalence.10 Due to the rareness of PNH, its global impact is not fully known.
PNH can affect men and women of all races and ages, but it is most commonly diagnosed between the ages of 20 to 40 years old.11-13 Following diagnosis, the median survival for PNH, if untreated, is approximately 10 to 15 years.3,12 Although PNH is rare, the medical community continues to learn more about the disease as new study results are presented.