This is an adaptation of the Chinese kung-work, and ho-together. The Anglicized term gung ho became widely known in English as a slogan that was adopted in WWII by the United States Marines under General Evans Carlson. The New York Times Magazine reported this in 1942:
A white blood cell (WBC) scan is an imaging test that uses a radioactive material called a tracer. It looks for infection or inflammation in the body. It is a type of nuclear scan.
The complete blood count (CBC) is a test that evaluates the cells that circulate in blood. Blood consists of three types of cells suspended in fluid called plasma: white blood cells (WBCs), red blood cells (RBCs), and platelets (PLTs).