A rare disease, also referred to as an orphan disease, is any disease that affects a small percentage of the population.
Most rare diseases are genetic, and thus are present throughout the person's entire life, even if symptoms do not immediately appear. Many rare diseases appear early in life, and about 30 percent of children with rare diseases will die before reaching their fifth birthday. With a single diagnosed patient only, ribose-5-phosphate isomerase deficiency is presently considered the rarest genetic disease.
No single cutoff number has been agreed upon for which a disease is considered rare. A disease may be considered rare in one part of the world, or in a particular group of people, but still be common in another.
Read more about Rare Disease: Definition, Relationship To Orphan Diseases, Prevalence, Characteristics, Public Research, Public Awareness, Support
Famous quotes containing the words rare and/or disease:
“When we want culture more than potatoes, and illumination more than sugar-plums, then the great resources of a world are taxed and drawn out, and the result, or staple production, is, not slaves, nor operatives, but men,—those rare fruits called heroes, saints, poets, philosophers, and redeemers.”
—Henry David Thoreau (1817–1862)
“There is a disease to which plays as well as men become liable with advancing years. In men it is called doting, in plays dating. The more topical the play the more it dates.”
—George Bernard Shaw (1856–1950)