The incidence of V (Rh10) and Js^a (K6) in the contemporary African American blood donor

Following an apparent increase in the number of patients with anti- V and/or anti-Js^a who required V– and/or Js(a–) red cell units, red cells from African American blood donors negative for C, E, S, K, Fy^a, Fy^b, and Jk^b were typed for V and Js^a over a 2-year period. Of the 438 donors typed for V and Js^a, 168 (38.36%) were V+ and 71 (16.44%) were Js(a+). The incidence of V (Rh10) was higher than that reported in previous studies, but no change was seen in the incidence of Js^a (K6). Immunohematology 1994;10:136–138.