The goal of this pilot clinical trial is to determine the feasibility of conducting a fully powered type 1 hybrid effectiveness-implementation trial on early sepsis care that is guided by early warning score in adult emergency department (ED) patients who have infection. The main questions it aims to answer are: * Is it feasible to execute the trial procedure and fulfill the progression criteria to a full-scale trial? * Does the Surviving Sepsis Campaign (SSC) Hour-1 Bundle care reduce the mortality of adult ED patients with a clinical diagnosis of infection and a National Early Warning Score 2 (NEWS2) equal to or greater than 5? * What are the barriers to and facilitators of the implementation of the SSC Hour-1 Bundle in the ED settings? Participants will receive the following SSC Hour-1 Bundle care during the intervention period: * Blood lactate level measurement * Blood cultures collection before administering antibiotics * Broad-spectrum antibiotics * Intravenous fluid * Vasopressors if the blood pressure remains low during or after fluid replacement to maintain the mean arterial blood pressure equal to or greater than 65 mmHg Researchers will compare patients who receive SSC Hour-1 Bundle triggered by a NEWS2 equal to or greater than 5 and patients who receive standard treatment based on clinical judgement to see if the SSC Hour-1 that is triggered by a high NEWS2 score could reduce mortality of adult ED patients with infection.
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All-cause 30-day mortality (in full-scale stepped wedge RCT)
Timeframe: 30 days