Ethnic Group Frequency (%) Fya positive % Fya positive Fyb Positive % Fyb positive Hausa 82 (50.6) 4 4.87 4 4.87 Fulani 23 (14.2) 1 4.34 2 8.69 Yoruba 20 (12.3) 0 0 0 0 Igbo 26 (16.0) 1 3.85 2 7.69 Others 11 (6.8) 1 9.09 1 9.09

Table 2: Distribution of Duffy antigen among subjects based on ethnicity.