Fig. 2

Parasite invasion into normal and variant Hb erythrocytes. a Invasion of NF54 into erythrocytes with variant (HbSS n = 35 and HbSC n = 31) and normal (HbAA n = 4) Hb genotypes. The assay was performed in duplicate. b Invasion rates in HbSS and HbSC samples with different blood groups, ‘O’ n = 38, ‘B’ n = 14 and ‘A’ n = 14. c Invasion in HbSS (‘O’ n = 24, ‘A’ n = 7, ‘B’ n = 4) and HbSC (‘O’ n = 14, ‘A’ n = 7, ‘B’ n = 10) RBCs categorized according to blood group antigen. The data in the graphs represent the median and the error bars are the interquartile range