CXCL8 and COVID-19: CXCL10 (IP-10), IL-8, and IL-6 were elevated in acute COVID-19 (p < 0.0001, p < 0.05, p < 0.001; Figures S5A–S5C) and correlated with disease severity (Figure 5A), consistent with large cohort studies of plasma cytokines (Chen et al., 2020; Laing et al., 2020; Mathew et al., 2020; Yang et al., 2020).