A complete blood count (CBC) provides important information about the kinds and numbers of cells in the blood: red blood cells, white blood cells, and platelets. A CBC can help a health professional evaluate symptoms (such as weakness, fatigue, or bruising) and diagnose conditions (such as anemia, infection, and many other disorders).
A CBC test usually includes:
White blood cell (WBC) count. More here.
White blood cell types (WBC differential). More here.
Red blood cell (RBC) count. More here.
Hematocrit (HCT, packed cell volume, PCV). More here.
Hemoglobin (Hgb). More here.
Red blood cell indices. More here.
Platelet (thrombocyte) count. More here.
Blood smear. More here.