Antigens Frequency Percentage (%) Fya+ 7 4.3 Fyb+ 9 5.6 Fy(a+b+) 1 0.61 Fya- 155 95.7 Fyb- 153 94.4 Fy(a-b-) 148 91.4

Table 1: The distribution of Duffy antigens among subjects.