For example, Her2 and CD30 are both cancer targets against which naked antibodies had been evaluated in a clinical setting before the development of the ADCs ado-trastuzumab emtansine and brentuximab vedotin, respectively.29, 30, 31 More recent research has focused on identifying targets whose biological role in cancer may be unknown, but whose expression profile is mostly restricted to malignant tissue. Here, ERBB2 is linked to cancer.