A complete blood count test (CBC), also called the full blood count, is a medical lab test that determines how healthy your blood cell components are —
- Red blood cells (RBCs) act as a vehicle to transport oxygen to other body parts.
- White blood cells (WBCs) defend our bodies against foreign substances. They help fight off infections.
- Haemoglobin (Hgb) is a protein containing iron that binds oxygen to RBC.
- Platelets help in the clotting of blood when there is an injury or cut to your body.
An abnormal increase or decrease in these components suggest an illness or disease such as anaemia, iron deficiency, bone marrow disease, autoimmune disease, cancer, heart disease, or an infection.