IL18 and COVID-19: We analyzed the protein levels of the inflammasome signaling proteins caspase-1 (Figure 1A), ASC (Figure 1B), IL-1β (Figure 1C) and IL-18 (Figure 1D) in patients with COVID-19 and patients who had recently recovered from a COVID-19 infection and compared them to the levels in plasma samples from healthy donors, who never had COVID-19.