PROBLEM TO BE SOLVED: To provide an agent for the treatment of infection that contains a PD-1 antibody as an active constituent.SOLUTION: The PD-1 antibody is useful for the treatment to infectious diseases caused by one or more pathogens selected from viruses, pathogenic protozoa, bacteria, and fungi.【課題】PD-1抗体を有効成分として含む感染症治療剤に関する。【解決手段】PD-1抗体は感染症に対する治療に有用である。【選択図】なし