Multiple sclerosis risk factors
| Racial or ethnic |
| Family history of multiple sclerosis |
| Sex |
| Major histocompatibility complex |
| Latitude of residence |
| Childhood infection |
| Age of exposure to infections |
| Socioeconomic status |
| Sex |
| Major hisocompatibility complex |
| Trauma |
| Pregnancy |
| “Stress” |
| Climate |
From Weinshenker and Rodriguez.160