The US FDA has approved mosunetuzumab-axgb (Lunsumio) for use in patients with relapsed or refractory follicular lymphoma who have received at least two previous systemic therapies. This is a first-in-class bispecific antibody that is designed to target CD20 on the surface of B cells and CD3 on the surface of T cells. This dual targeting activates and redirects a patient’s existing T cells to engage and eliminate target B cells by releasing cytotoxic proteins into the B cells. Mosunetuzumab-axgb is administered as an intravenous infusion for a fixed duration, which allows for time off therapy, and can be infused in OPD.