Patients with COVID-19 might have leukopenia (white blood cell count <4 × 10?/L); lymphopenia (lymphocyte count <1.0 × 10?/L); abnormal platelet counts; lower levels of hemoglobin; and higher levels of hypersensitive troponin I (hs-cTnI), C-reactive protein, and plasma concentrations of IL1B, IL1RA, IL7, IL8, IL9, IL10, basic FGF, GCSF, GM-CSF, IFNγ, IP10, MCP1, MIP1A, MIP1B, PDGF, TNFα, and VEGF. Here, CSF2 is linked to COVID-19.