RT Journal T1 THe cause of epidemic poliomyelitis JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD June 19 VO LII IS 25 SP 1998 OP 1998 DO 10.1001/jama.1909.02540510032005 UL http://dx.doi.org/10.1001/jama.1909.02540510032005 AB The occurrence during recent years in various places of epidemic poliomyelitis or epidemic infantile paralysis has given impetus to active study by modern means of various phases of this disease. The general features of a number of epidemics have been described, that in this country in 1907 involving about 2,000 cases by Starr1; that in Sweden, in which more than 1,000 cases occurred, was made the subject of an elaborate monographic study by Wickman,2 while the epidemic or series of outbreaks of poliomyelitis in Norway furnished material for an exhaustive investigation of the pathologic anatomy by Harbitz and Scheel.3According to the latter observers, the principal point of attack is the gray matter of the spinal cord, the poliomyelitis being associated with inflammatory infiltrations in the spinal membranes, and also with more or less strongly marked changes in the medulla and brain, the process being in reality