Risk of Infection in Patients with Multiple Myeloma Treated with T-cell Redirecting Approaches: a Call out for Clinicians

T-cell redirecting therapies such as chimeric antigen receptor T-cells and bispecific antibodies, are emerging as a novel class of immunotherapeutic agents for treatment of relapsed refractory multiple myeloma (MM). Their use is associated with an increased risk of infectious adverse events, fostered by cytopenias, hypogammaglobulinemia and T-cell exhaustion. Multiple ongoing clinical trials and real-world studies are investigating safety of T-cell therapy, highlighting the need for strategies to prevent and monitor the risk of infection. Recommended measures for risk mitigation include intravenous immunoglobulin supplementation, adequate prophylaxis therapy, vaccination and careful assessment for early diagnosis and treatment of infection. Here, we summarize available data on the risk of infections with approved and under development T-cell redirecting therapies for the treatment of MM.