A Clinical Trial to Evaluate agenT-797 Plus Standard of Care in Participants With Severe Pneumonia With Moderate to Severe Acute Hypoxemic Respiratory Failure

Key Inclusion Criteria: * Admission to an intensive care unit (ICU) with severe pneumonia of any etiology (viral, bacterial, fungal, or mixed), with and without trauma based on clinical suspicion * Acute hypoxemic respiratory failure (AHRF) * Evidence of moderate to severe acute respiratory distress syndrome (ARDS) based on Global ARDS criteria * Onset of severe pneumonia with AHRF ≤7 days prior to informed consent Key Exclusion Criteria: * More than two vasopressors to maintain a mean arterial pressure ≥65 millimeters of mercury at the time of informed consent * Pregnancy or breastfeeding * History of cytokine release syndrome, as documented in the medical record or reported by the participant, legally authorized representative, or close relative * Current participation in another interventional clinical trial, or receipt of an investigational medicinal product within 30 days prior to screening, unless reviewed and approved in writing by the medical monitor Note: Other protocol-defined inclusion/exclusion criteria may apply.