IL17A and hydrops fetalis: These post‐IR interactions, which now involved IL‐17A expression from both αβT/ILC and γδT cells, spread to encompass most epidermal HF cells and keratinocytes (OB/IB, INFU B, uHF I/II/V, IFE BI/ BII, SG, IFE KII/DI), and many dermal stromal populations (FIB‐III/I, BEC, LEC) as well (Appendix Fig S12B).