Canadian Health&Care Mall suggests the discussion of the most rare diseases. Rare diseases are the diseases affecting a very small part of population. Stimulation of their researches and creation of drugs for them usually requires support from the state. Many rare diseases are genetic, and, therefore, accompany the person during all life even if symptoms are manifested not at once. Many rare diseases arise in the childhood, and about 30% of children with rare diseases don’t live till 5 years old.
There is no uniform level of disease prevalence in population to consider it rare. The disease can be considered rare in one part of the world or among some group of people, but to be widespread in other regions.