The purpose of the study is to test the effectiveness and safety of Reltecimod, an investigational drug, on patients with acute kidney injury associated with serious infections. The drug will be administered at a dose of 0.5 mg/kg as an intravenous infusion given over 10 minutes. There are a total of 11 study visits- only one of which involves IMP administration. The other nine visits are for follow-up of the participant's condition over a three month period. The majority of these visit will be completed by the end of the fist 30 days of the participants' trial timeline.