To identify possible ATX expressing cells in the nasopharyngeal swab (NS) samples (Figure 1), peripheral blood monocytes (PBMCs) in the circulation (Figure 2 and Figure 3), as well as in BALF and lung tissue cells, we re-analyzed and mined several scRNAseq datasets of COVID-19 patients and healthy controls, from recent high impact studies (Table 1), collectively interrogating the gene expression of more than 106 cells; cell clustering and naming followed that of the original analyses, which both varied between studies/datasets. This evidence concerns the gene ENPP2 and COVID-19.