A Study Investigating the Safety, Tolerability, Drug Levels and Drug Effect of BMS-986278 in Healthy Adult Participants (Part 1) and Japanese Participants (Part 2)

Inclusion Criteria: * Participants in the Japanese cohort (Part 2) must be first generation Japanese (born in Japan, not living outside of Japan \> 10 years, both parents ethnically Japanese). * Body mass index (BMI) of 18.0 kilogram (kg)/meter (m)\^2 through 32.0 kg/m\^2, inclusive. BMI = weight (kg)/(height \[m\])\^2. * Body weight ≥ 50 kg for males and ≥ 45 kg for females. Exclusion Criteria: * Any significant acute or chronic medical illness. * Any gastrointestinal (GI) disease or surgery (including cholecystectomy) or other procedures (for example, bariatric procedures) that could affect drug absorption, distribution, metabolism, and excretion. * Any major surgery within 4 weeks of first study intervention administration. Other protocol-defined inclusion/exclusion criteria apply.