The present invention provides purified blood plasma products from fraction II+III containing proteins at concentrations useful for the treatment of various diseases and infections including hepatitis B virus. Methods of manufacture and treatment are also provided. The purified blood plasma products regulate levels of immune cells and their proteins in the organs and peripheral blood of treated subjects. Examples of immune cells and associated proteins regulated by the purified blood plasma products include CD62L levels on T cells, CD4+, CD8+, CD28+, and Foxp3+ T cells, B cells, as well as granulocytes and macrophages.
