With colleagues, Raffield lab graduate student Micah Hysong recently published a paper in Blood Advances 鈥�.鈥� This paper conducts a phenome-wide association study of Duffy-null status across >1400 clinical conditions in All of Us, the Vanderbilt University Medical Center’s Biobank, and the Million Veteran Program. This PheWAS revealed that Duffy-null status is only reproducibly associated with changes in white blood cell count and not with any disease outcomes. We also found that self-identified race is not an accurate predictor of Duffy-null status or associated benign neutropenia in All of Us.