Significantly, we found that CD209 expression in lung monocyte-derived macrophages (MoD Mø) and blood classical (CD16− or CD14+) monocytes was severity-dependently decreased in samples from COVID-19 patients, while blood CD16+ monocytes showed a severity-dependent increase of CD209 expression in the dataset of Wilk et al. [15]. The gene discussed is CD209; the disease is COVID-19.