CLINICAL VIRAL INFECTIONS AND MULTIPLE SCLEROSIS

Over an 8 year period, 170 patients with multiple sclerosis (MS) and 134 healthy controls were assessed at monthly intervals in order to ascertain environmental factors which might be important in producing exacerbation or progression of the illness, and to compare the frequency of common viral infections in the two groups. During cumulative periods designated "at risk" (2 weeks before the onset of infection until 5 weeks afterwards) annual...