Biopharma happenings, including deals and partnerships, grants, preclinical data and other news in brief: A2, Abivax, Amgen, Arbor, Astrazeneca, Bioinvent, Biontech, Bridgebio, Celcuity, Cocrystal, Compugen, Cytokinetics, Halberd, Helix, Hyundai, Jaguar, Merck & Co., Open Orphan, Prep Biopharm, Pfizer, Recce, Regenxbio, Tonix, Vincera.