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Almost one in four blood bank supplies in certain regions of Africa may have malaria parasites in them. UK scientists reviewed 26 studies that measured levels of Plasmodium parasites among blood donors in sub-Saharan Africa between 2000 and 2017. Percentages varied greatly across the nine countries included in the study, ranging from 0% to as much as 74%, with an average of 23.46% tested positive.

Oxford and the mosquito