The invention provides multifunctional antibody-ligand traps and methods of using them to counteract immune tolerance and/or immune dysfunction. The multifunctional antibody-ligand traps and fusion proteins of the invention can counteract immune dysfunction in order to restore and unleash antitumor or pathogen-directed immune responses. Provided here are promising immunotherapeutic agents for treatment and prevention of cancers, infectious diseases, and immuno-inflammatory disorders.
