Multiple sclerosis (MS) is, in basic terms, an inflammatory condition whereby an individual's immune system attacks, and causes damage to the protective sheath covering the nerves (also referred to as myelin) thereby disrupting normal communication between the spinal cord, the brain, and the rest of the body. Myelin provides some form of cover to the nerves, and when it is damaged, nervous axons, which are responsible for the conduction of impulses, do not function effectively. Moreover, with continued loss of myelin, the nerves become more prone to damage, and gradually deteriorate, causing the patient to develop symptoms as a result of lost or diminished impulses. The symptoms experienced will depend on the nerves affected, as well as the extent of damage. It is estimated that around 400,000 persons in the U.S. suffer from MS. Causes

The actual cause of MS is yet to be discovered; however, most theories describe it as an auto-immune disease caused by various factors ranging from childhood viral infections to genetics (Mayo Clinic, 2014; National MS Society, 2014). Vitamin D deficiency and over-consumption of salt have also been identified as other possible causes of the disease, but these are theories that are yet to be proven.

Risk Factors

So, what would actually make one individual more prone to MS, compared to another?

Age: MS has been found to be more common among people of younger ages, particularly those aged between 15 and 60 (Mayo Clinic, 2014). The disease is very rare among young children,...

It is more prevalent in Europe, northern U.S., Southern Australia, New Zealand, and Southern Canada; and less common in Africa and Asia (Mayo clinic, 2014). According to the National Multiple Sclerosis Society (National MS Society, 2014a), the high prevalence rates in temperate zones is due to the fact that such zones experience relatively low amounts of sunlight, and people in such areas have lower levels of vitamin D, which is believed to protect the body against immune-mediated health conditions.
Family History: genetics do have a critical role to play in the development of MS - one has a higher risk of developing the disease if they have a first-degree relative with the same (Mayo Clinic, 2014). However, the risk has been found to be relatively low.

Infectious Factors: childhood exposure to such viruses as Epstein Barr, which causes mononucleosis and other bacteria and microbes recognized as causes of myelin damage increases one's risk of contracting MS…