Immunology research topics can be very broad, covering allergies, infection, autoimmunity, neuroimmunology, cancer, vaccine, transplantation, etc. Among all, cancer immunotherapy is a rapidly growing field that is completely transforming oncology care. The concept is to boost a person's own immune system to eliminate tumor cells. Currently, several types of immunotherapy, including adoptive cell transfer and immune checkpoint inhibitors, have been proven to demonstrate clinical responses. For example, CAR-T therapies are approved to treat lymphomas and leukemias. Monoclonal antibody drugs against PD-1/PD-L1 are approved for treating various cancer types.