Expression of STAT5A (signal transducer and activator of transcription 5A), a member of the STAT family of transcription factors important in signal transduction, was upregulated in ILC1, ILC2 and ILCp cells (adj.p= 2.7e-08, 9.3e-04 and 0.09, respectively), from COVID-19 patients compared with controls (Figures 3A, C; Supplementary Data File 1). Here, STAT5A is linked to COVID-19.