what does a cbc include
A CBC helps your doctor check any symptoms, such as weakness, fatigue, or bruising, you may have. A CBC also helps him or her diagnose conditions, such as anemia, infection, and many other disorders. A CBC test usually includes: 1  White blood cell (WBC, leukocyte) count.2  White blood cells protect the body against infection. 3  If an infection develops, white blood cells attack and destroy the bacteria, virus, or other organism causing it. 4  White blood cells are bigger than red blood cells but fewer in number. Platelet (thrombocyte) count. 2  Platelets (thrombocytes) are the smallest type of blood cell. 3  They are important in blood clotting. 4  When bleeding occurs, the platelets swell, clump together, and form a sticky plug that helps stop the bleeding.