Infection density and severity after CAR–T-cell infusion. (A-B) Infection densities are shown for infections occurring during the first 28 days (A) and day 29 to day 90 (B) after CAR–T-cell infusion. *Bacteremia and respiratory virus categories are subsets of the bacterial and viral categories, respectively. (C-D) Number of patients with a maximum grade of mild/moderate, severe, or life-threatening/fatal infection severity during the first 28 days (C) and between days 29 and 90 (D). (E-F) Severity of all infection events during the first 28 days (E) and days 29 to 90 (F) after CAR–T-cell infusion.