09 November 2021 1 5K Report

We collected the plasma filtrate from the plasma exchange of the patients and stored it in -80℃. Now we attempt to obtain the IgG from the filtrate, however, we worry that the IgG may be degraded and inactive since the filtrate has been frozen for 2 years. Generally, how long can such IgG be stored, and whether extra preprocess is needed for the storage?

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