CRP and COVID-19: Median values of post–COVID-19 inflammatory markers or indices were assessed at the same time as the clinical reassessment (median of 44 days from COVID-19), and their categorical distribution is summarized in Supplementary Table 3 (available online); Supplementary Figure 2 (available online) reports the Kaplan-Maier survival curves for post–COVID-19 survival according to CRP, LDH, NLR, PLR, and OIS.