Achilles Therapeutics plc announced that the first patient in the United States (US) has been enrolled in the Company’s ongoing Phase I/IIa CHIRON clinical trial. CHIRON is an open-label, multi-center Phase I/IIa trial evaluating the safety, tolerability, and activity of clonal neoantigen T cell (cNeT) therapy as a single dose in adult patients with advanced metastatic non-small cell lung cancer (NSCLC). cNeT are selectively expanded T cells that target a patient’s own clonal neoantigens which are present on all tumor cells but absent from healthy tissue. This first US patient was enrolled at the Moffitt Cancer Center in Tampa, FL where Dr. Benjamin Creelan is the Principal Investigator. CHIRON is now open at 10 sites in the UK, EU and the US.