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d RHD*09.04, accounting for more than 95% of Caucasians with a serological weak D phenotype, were not found. Our study reaffirms that the distribution of D variant alleles differs between East Asians and Caucasians. Our findings also indicate that some D variants including RHD*01W.33 and RHD*01W.43 are at risk of being mistyped as D-positive by a highly sensitive RhD typing method such as an automated microplate method. RhD-immunoglobulin (RhIg) prevents anti-D alloimmunisation in D-negative pregnant women when the fetus is D-positive