I don't follow the company, but based on the abstract I assumed they were both their vaccines: We examined patients from our E75 and vaccine X clinical trials. If they aren't both RXII owned vaccines, then at least they seem to be similar: E75 (HER2: 369-377) and another vaccine (X) are HLA-A2/3+-restricted peptides capable of stimulating CD8+ cytotoxic T cells with anti-HER2 tumor activity. This company used to be a RNAi company, but I guess they have transformed themselves. Peter