RecruitingPhase 2Drug trialA Study to Evaluate the Safety and Efficacy of a Single Dose of RABI-767 in Participants With Acute PancreatitisThe goal of this clinical trial is to test the safety and effectiveness of a single dose of RABI-767 given by endoscopic ultrasound (EUS) guided peripancreatic injection in participants with predicted severe acute pancreatitis. The main question the study aims to answer is: • Is a single-dose of RABI-767 given by EUS-guided peripancreatic injection safe in patients with predicted severe acute pancreatitis. The study also aims to answer: • Is a single-dose of RABI-767 given by EUS-guided peripancreatic injection effective in treating patients with predicted severe acute pancreatitis. Study participants will be randomly assigned (like the flip of a coin) to receive a single dose of RABI-767 plus supportive care or supportive care only. The study sponsor will compare safety and efficacy data collected from participants who receive RABI-767 to participants who receive supportive care only to test if RABI-767 is safe and effective.