Pham and colleagues1 published findings on the nature of anti-D among individuals carrying weak D Types 1 or 2. By evaluating 121 weak D Type 1 and 99 weak D Type 2 individuals and documenting 12 examples of autoanti-D, they present arguably the largest study to address, but not the first study to resolve, the nature of allo- and autoanti-D in these two most prevalent weak D types. Pham and coworkers imply consequences for transfusion and pregnancy, which are in full accordance with recommendations published in 2000.2 The current study lacks data on transfusion and pregnancy, which previous studies did address. There must have been transfusions and pregnancies in the 220 patients and many involving exposure to D+ blood.
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