CD19 and Alzheimer disease: (C) Total number ILC2s normalized to 105 live cells and (D) proportion of CD90+, Lin- cells (Lin- defined as CD3-, CD5-, CD11b-, CD11c-, CD19-, NK1.1-, and FcεR1-) determined to be ILC2s (IL-33R+) in skin-draining lymph nodes (sdLN) from WT or Rag1-/- mice with AD-like ear inflammation.