Smoking may boost multiple sclerosis risk

April 8, 2010 2:31:52 PM PDT
Smoking could increase a person's risk of multiple sclerosis in people who already have other risk factors for the neurological disorder. That's the finding of a study in the journal Neurology.

It suggests that smokers who have high levels of a protein that protects against the Epstein-Barr virus were twice as likely as nonsmokers to get MS.

Epstein-Barr is a common herpes virus.

Scientists say studying the potential risk factors simultaneously might provide clues as to why some people get MS and others do not.