Methods, compositions, and kits are provided for inducing an immune response in an individual (e.g., an individual having cancer). Aspects of the methods include administering an antibody composition having an allogeneic IgG antibody; and administering a treatment that activates antigen presenting cells. In some cases, the antibody composition includes polyclonal allogeneic IgG antibodies with a plurality of binding specificities. In some cases, the polyclonal antibodies are from sera pooled from 2 or more individuals. In some cases, the methods include administering an antigen presenting cell stimulatory agent. Aspects of the methods also include contacting an antigen presenting cell (dendritic cell (DC)) from an individual with a target antigen and an antibody composition having an allogeneic IgG antibody to produce a loaded APC, which can be used to induce an immune response in the individual. Aspects of the methods also include contacting a T cell of the individual with the loaded APC.