T-cell vaccine

A T-cell vaccine is a vaccine designed to induce protective T-cells. It is not a vaccine whereby T-cells are administered to the patient.
T-cell vaccines are designed to induce cellular immunity. They are also referred to as cell-mediated immune vaccines.
It is believed that CMI vaccines can be more effective than conventional B-cell vaccines for yielding protection against microbes which tend to hide within the host cell, and rapidly mutating microbes.
T-cell vaccines underwent clinical trials for HIV/AIDS in about 2009.
none had been approved.
However as at December 2020, the Pfizer-BioNTech SARS-CoV-2 vaccine was authorised pursuant to the US FDA's emergency use authorization and became the first FDA authorized T cell vaccine.