A U.S. Patent for a “Method for Removing Viruses in a Physiologically-Active Protein Containing Sample” was awarded to Chugaion May 19th, 2020. The present invention is a method for removing viruses in a physiologically active protein-containing sample which comprises viruses, which comprises the steps of: 1) applying the physiologically active protein-containing sample which comprises viruses to a protein chromatography column, and eluting, by means of applying an aqueous eluting solution to said column, an eluate comprises said viruses, 2) mixing the eluate of step (1) with an aqueous solution of low conductivity… Learn More