Plasma exchange with infusion of fresh plasma is the first choice for treatment of TTP, routine use of glucocorticods and gammaglobulin is recommended.
Others run defense for you, like the gamma globulin antibodies that are released by plasma cells during an immune response, or fibrinogen proteins, which are vital to forming blood clots and stopping bleeding.
Getting it in a way that you can re-infuse it in somebody else or getting out the proteins, the Gama globulin, the antibodies from that serum and using it as a way of both treatment and possibly prophylaxis but mostly treatment.