CD40LG and Guillain-Barre syndrome: IgM antibody labeling of myelin outpouchings varied in intensity between the samples (eFigure 4C and 4D, links.lww.com/NXI/A760); however, immunofluorescence intensity at the myelin outpouchings normalized to the internode (eFigure 4E and 4F, links.lww.com/NXI/A760) was again not significantly different between the serum samples of patients with ZIKV-GBS, patients with ZIKV-CON, or the healthy control group (1-way ANOVA, F(2,106) = 0.7417, p = 0.4788) (eFigure 4G, links.lww.com/NXI/A760).