a protocol of activating and administering human blood cells so that bone marrow histology and / or blood cell counts of patients suffering from a plastic anemia approach normal . the protocol includes culturing the blood cells in the presence of a cytokine and an ionophore . it is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure . it is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims .