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Multiple sclerosis (MS) is a disease of the central nervous system characterized by the destruction of the [[myelin]] sheath surrounding neurons, resulting in the formation of "plaques."  

'''Multiple Sclerosis''' (MS) is a disease of the central nervous system characterized by the destruction of the [[myelin]] sheath surrounding neurons, resulting in the formation of "plaques."  

MS is a progressive and usually fluctuating disease with exacerbations (patients feeling worse) and remissions (patients feeling better) over many decades. Eventually, in most patients, remissions do not reach baseline levels and permanent disability and sometimes death occurs.  

MS is a progressive and usually fluctuating disease with exacerbations (patients feeling worse) and remissions (patients feeling better) over many decades. Eventually, in most patients, remissions do not reach baseline levels and permanent disability and sometimes death occurs.  

MS is 3 times more common in women than men, with diagnosis usually made as young adults.   

MS is 3 times more common in women than men, with diagnosis usually made as young adults.   

The [[Hepatitis B vaccine]] significantly increases the risk of contracting MS.

According to the Centers for Disease Control and Prevention (CDC), the [[Hepatitis B vaccine]] does not increase the risk of developing multiple sclerosis or other demyelinating diseases. Studies have also shown no evidence of a relationship between the Hepatitis B, influenza and tetanus vaccines and relapses in MS patients.<ref>[https://www.cdc.gov/vaccinesafety/Vaccines/multiplesclerosis_and_hep_b.html FAQs about Hepatitis B Vaccine (Hep B) and Multiple Sclerosis] cdc.gov, retrieved September 27, 2011</ref>

See also [[demyelinating disorders]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#m</ref>

See also [[demyelinating disorders]].<ref>[https://www.cdc.gov/vaccines/about/terms/glossary.htm#m Vaccines & Immunizations: Glossary/Acronyms: Glossary] cdc.gov</ref>

==References==

==References==