Proportion of patients developing respiratory events across different types of hematological malignancies. Patients with prolonged neutropenia were those with AML and recipients of allogeneic stem cell transplants. Data for bars 1 and 2 from Rabbat et al,³¹ Chaoui et al,⁹ and Azoulay et al.⁹⁸ Data for bar 3 from Azoulay et al⁹⁸ and Pichereau et al.¹²² Data for bar 4 from Orasch et al.¹⁰ Data for bar 5 from Kerhuel et al.¹²⁷ Data for bar 6 from Azoulay et al.⁵ Data for bar 7 from Rabbat et al,³¹ Chaoui et al,⁹ and Azoulay et al.⁹⁸ Data for bar 8 from Algrin et al¹²⁸ and Wohlfarth et al.²⁸ CAR, chimeric antigen receptor.