The composition of liposomal lipid phase preparation was selected. The optimum ratio of liposomal lipid phase components was found to produce a a human liposomal recombinant alpha 2-interferon-containing preparation by extrusion across the polycarbonate membranes. The study gave rise to a lyophilized sterile liposomal recombinant alpha 2-interferon preparation. The agent was shown to be stable and retains its antiviral activity within a year.
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