ABSTRACTMETHOD FOR ACTIVATION OF HELPER T CELL AND COMPOSITION FOR USE IN THE METHODDisclosed are: a method for activating a helper T cell, which comprises the step of adding a WT1 peptide to an antigen-presenting cell to activate the helper T cell,wherein the WT1 peptide is capable of binding to any one selected from an HLA-DRB1[err]1501 molecule, an HLA-DPB1[err]0901 molecule and an HLA-DPB1[err]0501 molecule； a composition for use in the method； a therapeutic and/or prophylactic method for cancer by activating a helper T cell； a pharmaceuticalcomposition for use in the therapeutic and/or prophylactic method； and others. Figure for publication: None
