Acidic pH of the skin (4–6)Eyerich et al. 2018
Skin = a Peripheral Lymphoid OrganEgawa & Kabashima 2011 J Invest Dermatol 131: 2178–2185Ono & Kabashima 2015 Exp Dermatol 24: 630–631Matejuk 2018
Immune barrier contains innate sentinels: Resident APC, Innate Lymphoid Cells, Innate-like Cells, Keratinocytes, Adaptive Tissue Resident Memory CellsEyerich et al. 2018
