... exposure to viral illness with the subsequent development of MS. Here in a population-based Canadian cohort, we investigate the relationship between prior clinical infection or vaccination and the risk of MS. Methods: Using the longitudinal Canadian database, 14,362 MS index cases and 7,671 spouse controls...

..., sex and area of residence. The mean age at measles infection was for the cases 6.6 years and for the controls 5.7 years (p = 0.06). The cases had more frequently experienced bronchitis and/or pneumonia in the age group 11–15 years (OR = 3.20, 95% confidence interval 0.96–10.63). Tonsillectomies were...

... was ingested in the form of scrapie-infected sheep brains. It has, however, been shown that a modified host protein encoded by the gene specifying the scrapie amyloid precursor is critically involved in the pathogenesis of transmissible spongiform encephalopathies such as CJD, Gerstmann-Sträussler-Scheinker...