Additional Relevant Details The data, generated from multiple preclinical models, demonstrated important changes in the tumor microenvironment and the activation of acute and systemic tumor-specific immune cell responses following intratumoral administration of ADU-S100 (also known as MIW815), an investigational STING (Stimulator of Interferon Genes) Pathway Activator immunotherapy. Importantly, these preclinical data underscore the ability for ADU-S100 to induce tumor-specific memory mediated by immune cells (e.g. T-cells and NK-cells) whereby the immune system is able to eliminate specific cancerous cells upon their reintroduction without further therapy. Additionally, the anti-tumor efficacy achieved with ADU-S100 was enhanced by combination with an anti-PD-1 immune checkpoint inhibitor, and resulted in the complete eradication of local and distal tumors.