[Beta-propiolactone as a sterilizing agent in the manufacture of intravenous immunoglobulin preparations].

It was demonstrated with phi X174, phi e and x phages that the beta-propiolactone step, which eliminated the anticomplementary activity of the intravenous immunoglobulin (IgG) preparation. Intraglobin, inactivates more than 10(6) viruses/ml. This means additional safety with respect to those viral diseases for which specific and sensitive diagnostic methods are not available at present.