Houston Methodist Hospital is one such site conducting clinical trials and doctors there say recent results have shown promise. If you look at 28 days post-transfusion of the plasma, there is a significant reduction in mortality and death in those patients who received the plasma, Musser said. Despite the optimistic results from trials across the country, the Emergency Use Authorization of blood plasma as a treatment by the FDA is on hold, according to a New York Times article. It just means at this point the FDA wants additional information, said Dr. Musser. Although the Emergency Use Authorization is on hold for now, that is not to say things couldnt change after more data is collected.