However, the predictive efficacy of eosinophils in anti-CD19 CAR-T cell therapy was comparable to those of PD-L1 expression (AUC = 56%; 95% CI = 48-82%) and total mutational burden (AUC = 66%; 95% CI = 45-89%) used for anti-PD1 blockade therapies in melanoma patients 17. Here, CD19 is linked to melanoma.