ERBB2 and cancer: Similar to first generation CARs, several different scFvs have been used with second generation CARs including EpCAM for multiple carcinomas including breast and ovarian cancer (30), an HLA-A2 EBNA3C complex for Epstein–Barr virus (31), CS1 for MM (32), and ErbB2 for HER2 positive cancers (24, 25).