A blood count is a medical test that measures the number of red blood cells, white blood cells, and platelets in a sample of blood. It is used to help diagnose and monitor various conditions, such as anemia or infections.
Blood tests are done to determine the complete blood count as well as its biochemistry. (petsmagazine.com.sg)
Sometimes fatigue is a sign of anemia of chronic disease, a type of low blood count that develops when there is underlying inflammation in the body. (parsleyhealth.com)