2 nucleated red blood cells in 100 white blood cells is usually abnormal. 2 nucleated red blood cells out of 100 white blood cells is normal in newborns up to 1 week of age and abnormal in adults. Because nucleated red blood cells are usually found only in the bone marrow, there should be no nucleated red blood cells in the blood. If there are 2 nucleated red blood cells out of 100 white blood cells in the blood, it may be due to acute hemorrhagic anemia or other causes, where the number of red blood cells in the blood decreases dramatically, and in order to replenish the number of red blood cells in the blood, the nucleated red blood cells present in the bone marrow enter the bloodstream and cause the problem. It may also be caused by erythroleukemia, myelofibrosis, and metastatic cancer of the bone marrow. If there are 2 nucleated red blood cells in 100 white blood cells, you should go to the regular hospital in time, and the doctor will judge the cause of the disease according to the symptoms, signs and auxiliary examination, and give the correct treatment in time.