525 Preliminary safety, PK/PD and efficacy results from a first-in-human phase I/IIa clinical trial of BNT411, a systemic Toll-like receptor 7 agonist in patients with solid tumors... by Hendrik-Tobias Arkenau, Emiliano Calvo, Alain Mita, Young Kwang Chae, Devalingam Mahalingam, Ugur Sahin, Elena Garralda, Oezlem Tuereci, Vladimir Galvao, Stefan Symeonides, Maria Miguel, Hariz Hassan, Annette Baumhauer, Timo Völker, Marie-Cristine Kühnle, Roman Rösemann, Stefan Strobl