👉 A blood test is a diagnostic procedure used to evaluate the health of a person's blood cells. The purpose of a blood test is to determine whether a person has an illness or injury, as well as to identify any abnormalities in their blood cells. Blood tests are typically done by a healthcare provider using specialized equipment and procedures to measure and compare various substances in the body, including proteins, sugar levels, cholesterol levels, and other biomarkers. The accuracy of blood tests is crucial for diagnosing serious illnesses
