T3/KLH is an antigen-adjuvant conjugate of T3 (thyronine) and keyhole limpet hemocyanin (KLH). Conjugating the antigen with a protein adjuvant boosts the production of antigen-specific antibodies in vaccine models. This conjugation does not alter protein folding or disrupt primary epitopes, and it enhances cross-presentation and the generation of antigen-specific T cells.