NFASC and infection: Despite the high level of antigenic similarity between flaviviruses, we did not observe any selective nerve cell reactive autoantibodies in the DENV-infected control (DENV-CON) sera, in keeping with the rarity of GBS associated with recent DENV infections.32 Although we observed 1 case of anti–pan-NFASC protein isotype IgG1 autoantibodies in our Colombian cohort (ZIKV-GBS patient A), prodromal infection is not a consistent feature of this rare and potentially fatal peripheral neuropathy subtype.33