We observed enrichment of the megakaryocyte progenitor signature in the CD38+ HSPC populations in moderate COVID-19 compared to the healthy condition (Fig. 2k and Supplementary Table 8), but no enrichment of erythroid or myeloid signatures in either CD38− or CD38+ HSPCs (Extended Data Fig. 3g and Supplementary Table 8). The gene discussed is CD38; the disease is COVID-19.