8:45 AM. 236. Development of a Single-Injection Polio Vaccine with Microparticle-Based Timed Pulsatile Release.John Daristotle1, Xueguang Lu2, Zachary Tochka3, Kevin McHugh, Ph.D.4, Gary Li3, Nandita Menon3, Yehui Sun3, Stephanie Tomasic3, Tyler Graf3, Stephany Tzeng5, Adam Behrens3, Erica Budina3, Wenting Gao3, Ziqi Chen3, Timothy Forster3, Sviatlana Rose3, Dhruv Varshney3, Linzixuan Zhang3, Jooli Han6, Khanh Tran3, Sydney MacDonald3, Basit Jafri7, Bernardo Mainou7, Robert Langer3, Ana Jaklenec3 1OmniPulse Biosciences, 2Institute of Chemistry, Chinese Academy of Sciences, 3Massachusetts Institute of Technology, 4Rice University, 5Johns Hopkins University, 6Seoul National University College of Medicine, 7Centers for Disease Control and Prevention