Tse CF, et al. - Researchers sought to derive a clinical prediction rule [the Acute Febrile Respiratory Illness (AFRI) rule] to predict pneumonia in patients with acute febrile respiratory illness to Emergency Departments by logistic regression analysis based on clinical parameters. They performed a prospective multicentre study including 537 adults. Within the ARFI rule, AFRI score was derived via summation of 7 weighted factors including: age ≥ 65 (1 point), peak temperature within 24 h ≥ 40 °C (2 points), fever duration ≥3 days (2 points), sore throat (−2 points), abnormal breath sounds (1 point), history of pneumonia (1 point) and SpO₂ ≤ 96% (1 point). Outcomes suggest the possible potential utility of AFRI score in assisting emergency physicians in identifying pneumonia patients among all adult patients presented to ED for acute febrile respiratory illness.