CLINICAL TRIAL / NCT06111235

Inclusion Criteria: * Pathologically confirmed IR-NMIBC, per American Urologic Association/Society of Urologic Oncology/National Comprehensive Cancer Network guidelines, within 90 days of participant randomization: 1. Recurrent LG Ta within 12 months of prior LG or HG (HG Ta ≤ 3 cm) tumor 2. Solitary LG Ta >3 cm tumor 3. Multifocal LG Ta tumors 4. Primary and solitary HG Ta ≤3 cm tumor 5. LG T1 tumor * All visible disease removed by TURBT within 90 days of study randomization * Acceptable baseline organ function Exclusion Criteria: * High-risk NMIBC (e.g., HG T1, Recurrent or multifocal HG Ta>3cm tumor(s), CIS) * Low-Risk NMIBC (e.g., solitary LG Ta ≤3 cm tumor) * Disease in the prostatic urethra at any time or in the upper genitourinary tract within 24 months of randomization * Muscle-invasive bladder cancer, locally advanced or metastatic bladder cancer * Prior treatment with any human adenovirus serotype 5 based therapy (e.g., Adstiladrin)