All clinicians will be trained to properly perform the point-of-care CRP test. When a child tests positive on the 5-stage decision tree, a point-of-care CRP test will be performed in all 4 intervention groups. Only clinicians in group 1 and 3 will be trained in the brief intervention and handling of the parent information leaflet. All clinicians will be asked to measure oxygen saturation by means of a paediatric finger pulse oximeter, which will be provided to all physicians.