Immunological Response to Intravesical BCG Therapy of Superficial Bladder Cancer by Prior Administration of RUTI®

Inclusion Criteria: 1. Written ICF for participation in the study. 2. Age ≥18 years. 3. General health status according to WHO ≤ 2. 4. Have primary histologically confirmed T1 and/or high grade tumors and/or CIS. 5. All visible papillary tumors must be completely resected. 6. Early postoperative (within 24 hours of TURBT) single dose chemotherapy is allowed. 7. BCG therapy indication. 8. Never treated with BCG immunotherapy 9. Willing to comply with study visits and procedures as per protocol 10. Use of reliable contraception (see section 8.6) from the screening visit to 30 days after the last RUTI® or placebo injection. Exclusion Criteria: 1. Life expectancy \<5 years. 2. Have a severe concomitant disease that might limit compliance or completion of the protocol. 3. Have any other malignancy that might impact 3-year survival or might be potentially confused with NMIBC. 4. Have other neoplasms. 5. Have congenital or acquired immune deficiencies or under immunomodulatory treatment. 6. Be receiving cytotoxic drugs or systemic corticosteroids within 8 weeks of receiving the first administration of BCG. 7. Have received radiation therapy for their bladder cancer within 4 months prior to study entry. 8. Have active infections (including urinary tract infections) defined as viral, bacterial, or fungal infections requiring therapy, HIV-positive status, concurrent febrile illness, gross hematuria or other factor that could influence tolerability to intravesical BCG therapy. 9. Have biopsy, TURBT, or traumatic catheterization within 14 days of start of intravesical BCG treatment. 10. Have active tuberculosis at screening visit. 11. Active pregnancy or breastfeeding. 12. Soy allergy