The results indicated that CAR19‐IL24‐iNK cells produced higher levels of TNF‐α but lower levels of IFN‐γ and GM‐CSF, which were related to a reduced risk of cytokine release syndrome (CRS) and neurotoxicity in comparison with CAR19‐iNK cells (Figure S4C). Here, CSF2 is linked to congenital rubella syndrome.