“…The remaining 122 studies were considered for qualitative and quantitative synthesis, involving 7,814,996 participants. Among those 180 studies that did not meet our inclusion criteria, 73 did not study the prevalence of HIV among blood donors; 43 were systematic reviews 8 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ; 18 studies did not have relevant data 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 ; five studies did not have their full text available 32 , 48 , 67 , 68 , 69 , 70 , 71 ; 11 studies included population already positive for HIV 67 , 71 , 72 , 73 , 74 , 75 ; nine studies included children 53 , 54 ,…”