KITLG and congenital rubella syndrome: In a recent study, Ye et al. 37demonstrated the efficacy of using PBMC‐reconstituted NSG, NSG‐dKO or NSG‐SGM3 (expressing hIL‐3, GM‐CSF and SCF) mice to evaluate the induction of CRS after OKT3, TGN1412 analogue or Keytruda (anti‐PD‐1) treatment.