Project Summary The principal goal of this project is to demonstrate that the FDA-approved anthelminthic drug, niclosamide, can be reformulated in a synthetic lung surfactant which can be aerosolized for the treatment of infections caused by respiratory viruses. The studies proposed in this SBIR Phase I application will be focused on testing this concept by suspending niclosamide loaded liposomes in our proprietary lung surfactant technology (Niclosurf) and testing candidate Niclosurf formulations in a mouse influenza challenge model. The effectiveness of Niclosurf as a treatment for respiratory viral infections caused by influenza will be evaluated.