During history taking, clinicians participating in group 1 and group 3 will ask the brief intervention questions. After a thorough clinical examination, including measurement of the oxygen saturation, the clinician runs the decision tree. If the child scores positive, he will execute a POC-CRP-test. If the child scores negative, the intervention will depend on the intervention arm: clinicians participating in group 1 and 2 will execute a POC-CRP-test anyway, clinicians participating in group 1 and 3 will hand over the parent information leaflet and clinicians participating in group 4 will pursue usual care.