SELP and COVID-19: IL-8, D-dimer, S100B, IL-6, Angpt-2, MMP-8, TNF-R1, u-PAR, u-PA, osteopontin, IL-13, TNF-α, pentraxin-3, P-selectin, fractalkine, and SP-D levels were elevated in critically ill COVID-19 males compared to severe cases.