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.本發明提供一種提高活體免疫能力的方法,該方法包括對一致病原所存在環境,施予一種可關閉該致病原的免疫抑制功能的組成物。該病原所存在環境包括該致病原附著之活體宿主體內。該致病原的免疫抑制功能是由該致病原所分泌或產生的免疫抑制物質所提供。因此,該關閉該致病原的免疫抑制功能的組成物即包括關閉該免疫抑制物質作用的功能抑制劑。該功能抑制劑包括可辨認該免疫抑制物質或其一部份的抗體。本發明並揭示該抑制劑組成物的用途。