wbc generally refers to white blood cells. White blood cells, white blood cell, or wbc for short, are colorless, spherical, nucleated blood cells that, along with red blood cells and platelets, are known as the three major blood cells. In addition to white blood cells, human blood also contains red blood cells, platelets and plasma. Often referred to as immune cells, leukocytes are part of the body’s immune system and help the body fight off infectious diseases and foreign antigens. Normally, the body of a healthy adult contains (4 to 10) x 10^9 white blood cells per liter of blood. Inflammation in general causes an increase in the number of leukocytes in the blood, and other blood system diseases such as chronic leukemia can also cause an increase in leukocytes. Leukocytes generally have the ability to move actively and are found in the lymphatic system, spleen, and other tissues of the body in addition to the blood. Consult a hematologist for specific knowledge.