The invention disclosed herein relates generally to immunotherapy and, more specifically, to the use of immunotherapy for treating tumors and pathogen infected tissues by first priming patients with allogeneic cells designed to be rejected by a Th1 mediated mechanism, then inducing necrosis or apoptosis in a tumor or pathogen infected lesion by methods such as cryotherapy, irreversible electroporation, chemotherapy, radiation therapy, ultrasound therapy, ethanol chemoablation, microwave thermal ablation, radiofrequency energy or a combination thereof applied against at least a portion of the tumor or pathogen infected tissue, and then delivering one or more doses of allogeneic cells (e.g., Th1 cells) within or proximate to the tumor or pathogen-infected tissue in the primed patient. The present invention provides an immunotherapeutic strategy to develop de-novo systemic (adaptive) immunity to a tumor or pathogen.
