When compared to non-infected controls, protein levels of caspase-1 (Figure 1A), ASC (Figure 1B), IL-1β (Figure 1C) and IL-18 (Figure 1D) were higher in patients with active (Positive) COVID-19 (median day of blood collection: 11 days) and in patients who recently recovered from COVID-19 (median day of blood collection: 61.5 days). Here, IL18 is linked to COVID-19.