In univariate analysis (Supplementary Table 4), risk factors influencing overall survival in the total population were age (p < 0.0001), performance status (p < 0.0001), time from HCT to COVID-19 (p = 0.04), ISI intermediate + high vs. low (p = 0.0008), ANC (p = 0.018), and the ALC/CRP ratio (p = 0.009). This evidence concerns the gene CRP and COVID-19.