ISR Immune System Regulation Holding AB (publ) is a Sweden-based research company within the area of immunotherapy. The Company is focused the development of drug therapies for viral infections, in particular human immunodeficiency virus (HIV). The Company's product candidate, ISR048, is undergoing phase II of clinical trials for HIV indications. It provides a resistance profile, which does not require co-dosing with a boosting agent. A second generation anti-HIV drug candidate, ISR049, is in preclinical development. The Company's another drug candidate in development, ISR050, shows immunostimulatory properties that are being explored in vitro and in animal models of chronic infections, such as tuberculosis.