Rare Diseases You've Never Heard Of
Become Aware of Rare Diseases
A disease or disorder is considered rare if it affects fewer than 1 in 2,000 people. In an effort to help raise awareness about rare diseases, here is some basic information about the characteristics and problems facing those with rare diseases, as well as an introduction to several rare conditions you might not know existed.
Review Date:February 28, 2014
Last Updated:July 1, 2014