IL17A and Lassa fever: Interestingly, Th17 cells have been associated with helminth-induced overt pathology (Katawa et al. 2015) including elevated expression levels of Th17 cytokine family members (IL-17A, IL-17F, IL-21, IL-23) in peripheral blood mononuclear cells (PBMCs) from LF patients with chronic pathology (Babu et al. 2009).