The results of blood tests can often be confusing for parents, especially when it comes to their children. When we receive the laboratory report, we often do not know what the value marked with a star means and how much we should worry. The situation is further complicated by the fact that the reference ranges indicating normal values often apply to adults, making them not always relevant for children. This article aims to help parents interpret laboratory results and provide information on the most important blood test parameters. The basic blood count, as well as indicators of inflammation and infection such as CRP and sedimentation rate, are all important parts…