The present invention provides a method for blocking immunosuppressive functions of pathogens, comprising: applying to an environment where the pathogens exist a composition that blocks immunosuppressive functions of the pathogens. The immunosuppressive functions are provided by an immunosuppressive substance secreted or produced by the pathogens. The composition includes a function inhibitor that comprises an antibody identifying the immunosuppressive substance or a fragment thereof. Use of the function inhibitor composition is also disclosed.
