Results of external validation of the evidence-based clinical guidelines for management of fever. aNumber of cases (n) out of the total population of all children (N). bPercentage testing positive in all included children. c'Traffic light' system of clinical features that are designed to be used to assess the risk of serious infection, and to provide clinical guidance for actions needed according to these categories. dAlarm symptoms at clinical examination: seriously ill impression, reduced consciousness, persistent vomiting, petechiae, tachypnea and/or dyspnea, reduced peripheral circulation, pallor, and signs of meningeal irritation; probability of illness (in percentage) before testing (blue dot), after a positive test result (red dot with + sign) and after a negative test result (green dot with - sign).