Oncologist Lu You’s research group at Sichuan University injected a patient with CRISPR modified cells on November 15, marking the first time CRISPR gene-editing has been tested in a human. The team delivered modified cells into a patient suffering from aggressive lung cancer as part of their clinical trial at the West China Hospital in Chengdu. The study stands as a key milestone in the CRISPR revolution, which began in 2013 with the discovery of CRISPR’s genome editing potential.