Most drug developers working in the immunotherapy space focus on existing therapeutic targets when developing cancer drugs, optimizing ways of drugging them via engineering modalities such as CAR T-cell approaches, CRISPR editing or antibody-drug conjugates that deliver toxic payloads. The angle of one company – Cartography Biosciences – is the opposite to this. Its modus operandi is to pinpoint the immunological targets first, leveraging tools that already exist, before building therapies around them.