In the second study period, the GP groups were switched - previous control group received combined intervention, but previous intervention group re-established usual care, but the long-term education effect was evaluated in this group.<h4>Subjects</h4>Children with acute infections consulted by a GP.<h4>Main outcome</h4>Impact of combined intervention and long-term education on testing level (CRP, full blood count, Strep A test, influenza test, urinalysis and X-ray) before antibiotic prescribing. This evidence concerns the gene CRP and influenza.