Poghosyan Elena Vladimirovna is a person who, soon after graduating from the Faculty of Biology of Moscow State University, left for Armenia, where she received a second education at the Yerevan Institute for Advanced Medical Studies and worked for about 10 years as a laboratory assistant and head of the laboratory service of the medical unit. She participated in helping victims of the Spitak earthquake, as well as refugees from Sumgait and Baku. This book is intended for a wide range of readers who want to learn more about their health. It will help you understand the most common tests used in clinics and hospitals with their complete and detailed interpretation. It will give answers to the most common questions related to clinical laboratory tests, help you understand the test results, and consciously and responsibly follow the instructions of your doctor.