Primary care to Prevent Infectious Diseases
A rare disease is any disease that affects a little portion of the population.
Most rare diseases are genetic, and thus are present throughout the person's complete life, even if symptoms do not instantly appear. Many rare diseases appear untimely in life, and about 30 per cent of children with rare diseases will perish before reaching their fifth birthday. With a single recognized patient only, ribose-5-phosphate isomerase inadequacy is considered the rarest genetic disease.
A disease may be examined scarce in one part of the world, or in a specific group of people, but still be prevalent in another.