421 Initial results of a phase 1 trial of RP2, a first in class, enhanced potency, anti-CTLA-4 antibody expressing, oncolytic HSV as single agent and combined with nivolumab in pat... by Anna Olsson-Brown, Joseph Sacco, Mark Middleton, Kevin Harrington, Robert Coffin, Howard Kaufman, Suzanne Thomas, Praveen Bommareddy, Francesca Aroldi, Pablo Nanclares, Lavita Menezes, Selda Samakoglu

507 A phase 1 clinical trial of RP2, an enhanced potency oncolytic HSV expressing an anti-CTLA-4 antibody, as a single agent and combined with nivolumab in patients with advanced s... by Anna Olsson-Brown, Joseph Sacco, Mark Middleton, Kevin Harrington, Robert Coffin, Andrea Pirzkall, Praveen Bommareddy, Isla Leslie, Francesca Aroldi, Pablo Nenclares, Tze Chan, Imran Saleem, Henry Castro

547 CERPASS: A randomized, controlled, open-label, phase 2 study of cemiplimab ± RP1 in patients with advanced cutaneous squamous cell carcinoma by Andrew Haydon, Celeste Lebbe, Jose Lutzky, Gregory Daniels, Ragini Kudchadkar, Ann Silk, Nikhil Khushalani, Frances Collichio, Jean-Jaques Grob, Samantha Bowyer, Praveen Bommareddy, Andrew Hill, Danny Rischin, Daniel Brungs, Michael Migden, Matthew Fury, Jenny Lee, Muhammad Alamgeer, Dimitrios Colevas, Wanxing Chai-Ho, Piyush Sheladia, Shui He, Claudia Andreu-Vieyra