The normal value for white blood cells, which include granulocytes and lymphocytes, is 4-10×10^9/L. The main role of red blood cells is to carry oxygen, and the normal value is (4-5.5)×10^12/L for men and (3.5-5)×10^12/L for women. the number of white blood cells is affected by many factors, such as overexertion, drinking too much water or getting infected. If the total number of white blood cells is less than 4×10^9/L, the number of white blood cells is too low and may be due to a viral infection or aplastic anemia, etc. If it is greater than 10×10^9/L it is leukocytosis, which may be due to bacterial infection, leukemia, etc. If the red blood cells are within the normal range and the hemoglobin level is lower than normal, it may also lead to anemia. Only if the values of both hemoglobin and red blood cells are in the normal range, it can ensure a good supply of oxygen to the person.