Genetics
The exact cause of Multiple Sclerosis is unknown. This disease is not contagious or directly inherited. However, it is known that there are genetically susceptible individuals. They have found that every person in the US has a 1 in 750 chance to be affected by this disease. If a sibling, parent, or non-identical twin is a MS sufferer you have a 1 in 40 chance. If you are identical twins, obviously with identical genetics, you only have a 1 in 4 chance; therefore, showing that genetics isn’t the only key.
Geography
The environment in which you live also has some sort of role in MS susceptibility. MS is more common in the northern latitudes. The closer you live to the equator the less common developing MS is.
Gender
Women are two to three more times likely to be affected by Multiple Sclerosis. This is common in all auto-immune diseases. Like other MS factors, this is under research to see if hormones play a role.
Quiz: http://www.healthcentral.com/multiple-sclerosis/quizzes-tools-263081.html
