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Median CD4 cell counts in African populations (Botswana [34], Central African Republic [35], Ethiopia [36, 37], Guinea-Bissau [38, 39], Kenya [40], Malawi [41], Nigeria [42], South Africa [6], Tanzania [43, 44], Uganda [45, 46], and Zambia [47]). Dots represent 95th percentiles in sample. Blue markers represent males, red markers represent females, and green markers represent both sexes.
