Low white blood cell counts are commonly caused by viral infections, conditions that cause depleted bone marrow, severe infections, and certain medications that eradicate white blood cells, according to Mayo Clinic. Spec... More »

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A congenital or autoimmune disorder, cancer, a viral infection, an overwhelmingly strong infection, or certain drugs may cause a low white blood cell count, Mayo Clinic advises. Damage to bone marrow, which produces whit... More »

A low red blood cell count means cells in the body are not receiving enough oxygen. Anemia is the most common cause for an abnormally low amount of red blood cells, affecting 3.5 million Americans, as reported by WebMD. More »

Low white blood cell counts are treated with blood transfusions and medications that stimulate production of blood cells, according to Mayo Clinic. If white blood cell counts are low due to cancer treatment, physicians m... More »

Low white blood cell counts may occur when patients have conditions that interfere with bone marrow functioning or conditions like cancer, viral infections and autoimmune disorders, according to Mayo Clinic. Severe infec... More »

Low platelet count can be caused by acquired or inherited conditions, which may cause the body's bone marrow to decrease platelet production, according to the National Heart, Lung, and Blood Institute. The body may destr... More »

Low platelet count, or thrombocytopenia, is caused by such conditions as an enlarged spleen, which may trap too many platelets and remove them from blood circulation; bone marrow destruction due to cancer and its treatme... More »