Figure 2. Frequency and 95% confidence intervals for fatal influenza cases (n = 105) compared with the NHANES reference group for pooled structural genotypes (AA/AO/OO) of MBL2 and categorization of MBL production on the basis of genotype (low/intermediate/high). Frequencies did not differ significantly between cases and the reference group. MBL, mannose-binding lectin; NHANES, National Health and Nutrition Examination Survey; MBL2, mannose-binding lectin gene. Error bars represent confidence intervals.