To contextualize IL18R1 expression levels in healthy individuals and in non-hospitalized patients with mild respiratory infections, we analysed blood microarray data obtained from human challenge models of H1N1 infection, H3N2 infection, human rhinovirus virus (HRV) infection and RSV infection during 38 hours prior to infection and up to 170 hours after infection22. Here, IL18R1 is linked to infection.