Abstract: There is disclosed a method of inactivating reproducible filterable pathogens in blood plasma products by applying elevated temperatures. The blood plasma products are heat treated in a solid state in a closed inactivation container in the presence of specific amounts of water and organic compounds, provided that the water substantially remains physically bound to the blood plasma products, while the organic compound is present in a gaseous form in the atmosphere. The water content of the blood plasma products is 0.08 to 0.40. The concentration of the organic compounds in the gaseous phase is 0.01 to 10 g per liter of container volume.

Abstract: A method of inactivating viruses in blood products is described, wherein the blood products are heat-treated in a humid or in a solid state in the presence of inorganic or organic hydroxyl group-containing compounds having an H.sup.+ -dissociation constant of <10.sup.-11 in a concentration of more than 0.05 (5% by weight) and less than 0.70 (70% by weight). The hydroxyl group-containing compounds may be water, methanol, ethanol or mannitol. The temperature may amount up to 121.degree. C., the heat treatment may last from 1 s to 100 h. The inactivation method may be applied for producing blood products selected from enzymes, proenzymes including coagulation factors, enzyme inhibitors, immunoglobulins, albumin, plasminogen, fibrinogen, fibronectin or plasma, the inactivation destroying any reproducible filterable pathogens that might be present.