global down syndrome

This disease originated from   

down syndrome Down syndrome is a congenital condition caused by an extra chromosome. The presence of an extra number 21 chromosome causes the distinctive facial features, physical characteristics and the cognitive impairments seen in people with Down syndrome. While people with Down syndrome have some characteristics in common, it is very important to remember that each person with Down syndrome is an individual with strengths and weaknesses. also you have 46 chromosomes and if you have an extra one you could get down syndrome. it did not spread anyone can have it its not spreadable.