IL7R and COVID-19: To more precisely define the impact of COVID-19 on ILCs, we employed a single cell multi-omics approach consisting of Abseq (18) and single-cell RNA sequencing (19) to probe the surface protein marker expression and transcriptional profile respectively, and to evaluate the heterogeneity of CD127+ ILCs in peripheral blood of patients with asymptomatic to moderate and long-term COVID-19 compared with healthy control participants.