Study of the Efficacy and Safety of Immune Globulin Intravenous (Human) Flebogamma® 5% Dual Inactivation and Filtration (DIF) in Participants With Post-polio Syndrome

This was a multicenter, prospective, randomized, placebo-controlled, double-blind, parallel group clinical trial with adaptive dose selection in participants with post-polio syndrome (PPS). The main purpose of this study was to select a dose of Flebogamma® 5% DIF and confirm the efficacy of the selected Flebogamma® 5% DIF dose by assessing physical performance, as measured by Two-Minute Walk Distance (2MWD) test. The study consisted of 2 stages, with each stage consisting of a screening period (up to 4 weeks), a treatment period (52 weeks), and a follow-up period (24 weeks).