CD19 and infection: However, ROC curve analysis showed that in the first month after RTX was used, compared with the percentage of CD19+ B lymphocytes, the percentage of eosinophilic granulocytes was more sensitive in predicting the incidence of infection in elderly patients with IMN (AUC = 0.329 vs. AUC = 0.555), although neither of these two indicators was a good predictor of infection risk (Table 6, Figure 6).