IL1B and COVID-19: In serum collected 1–11 days after onset of SARS-CoV-2 infection, median IL-1β in 4 asymptomatic persons infected with SARS-CoV-2 was 6.67 pg./mL, 13.07 pg./mL was measured in 66 symptomatic persons with COVID-19, and in 4 healthy controls median IL-1β was 4.78 pg./mL (Chi et al., 2020).