A member asked:

How many different rare diseases?

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Lots!: That's why they're rare!

Answered 11/25/2012

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Dr. Heidi Fowler answered

Specializes in Psychiatry

Rare disorders: According to National Organization for Rare Disorders (NORD)- " A rare disorder is a disease or condition that affects fewer than 200,000 Americans. Cumulatively, there are more than 7,000 rare diseases affecting more than 30 million Americans." REF: https://www.nidcd.nih.gov/directory/national-organization-rare-disorders-nord

Answered 9/7/2020

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