By filing an IND with the FDA to initiate a phase II/III study of EB-05, a monoclonal antibody, Edesa Biotech Inc. joined the handful of companies developing COVID-19 treatments that inhibit Toll-like receptor 4 (TLR4) signaling. The Toronto-based company’s stock (NASDAQ:EDSA) responded by rocketing 81.38% upward Thursday to close at $9.45, after trading as high as $19.10.