Additionally, correlation analyses between LEF1-AS1 and these markers (Fig. 4B) showed moderate significant correlations with CD8, CD19, and CD25 (R = 0.47, 0.44, and 0.44, respectively), suggesting that LEF1-AS1 may be up-regulated in these leukocyte subtypes in participants with complications after COVID-19. The gene discussed is CD19; the disease is COVID-19.