Common: <0.01% Caucasians, Blacks, and Asians are Dib- and at risk for developing anti-Dib.
Causes HDN: Yes
Critical Titer: 1:16
Anti-Dib usually only causes mild HDN , but can sometimes cause severe HDN . "In Orientals, hemolytic disease of the newborn caused by maternal anti-Dib is likely to be more severe than that caused by anti-Dia."  Erythropoietin (commonly called Epogen) can be used to treat infants affected with anti-Dib . IVIG can also be used [8, 10]. Despite the rare severe case, there are many cases of HDN from anti-Dib do not need treatment [1,8].
8 - https://www.ncbi.nlm.nih.gov/pubmed/18316786