Bar graph showing number of rare diseases by number of published family cases by category from 1 case to 20 to 400 cases.

FIGURE 2-1DNumber of rare diseases by number of family cases in literature

From: 2, Profile of Rare Diseases

Cover of Rare Diseases and Orphan Products
Rare Diseases and Orphan Products: Accelerating Research and Development.
Institute of Medicine (US) Committee on Accelerating Rare Diseases Research and Orphan Product Development; Field MJ, Boat TF, editors.
Washington (DC): National Academies Press (US); 2010.
Copyright © 2010, National Academy of Sciences.

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