The CRP measuring range is 8-200 mg/L. The results are displayed in intervals of 1 mg/L. If the CRP concentration in a whole blood sample exceeds the range 8-200 mg/L, CRP >200 mg/L will be displayed on the screen. The haematocrit measuring range is 20-60%. If the Hct value is outside this range, an information code will be displayed on the screen. For internal quality a control positive will be measured to confirm the efficacy and correct performance of the test in the beginning and the middle of the study period. The CRP point of care test will be performed in case of a positive decision tree (irrespective of the intervention group) and also in case of a negative decision tree by clinicians of intervention group 1 and 2. Because no reliable cut-off points for CRP are known currently (as this is the aim of this study) for acute infections in children in primary care (nor for referral, nor for prescription of antibiotics), clinicians will not be given guidance on the interpretation of the CRP results.