Diagnosis and transfusion regimens in 407 thalassemia patients enrolled in the Centers for Disease Control and Prevention (CDC) Thalassemia Blood Safety Network. The plot is a visualization of data presented by Vichinsky et al.¹⁴  The width of the ring is proportional to the total number of patients in each category. Thalassemia major (TM) patients in the “never transfused” category were under 1 year of age and yet to begin chronic transfusion at the time of enrollment. TI indicates thalassemia intermedia; and Thal, thalassemia.