In a retrospective analysis of 235 patients with COVID-19, Su L et al. [34] found that the presence of invasive fungal infection (IFI) was associated with the use of broad-spectrum antibiotics (aOR 4.4), fever (aOR 2.3), log IL-6 concentration (aOR 1.2), and prone ventilation (aOR 2.3). Here, IL6 is linked to COVID-19.