In addition, higher concentrations of granulocyte colony-stimulating factor (GCSF), IFN-γ-inducible protein 10 (IP10), monocyte chemoattractant protein-1 (MCP1), macrophage inflammatory protein 1-A (MIP1A), and TNFα cytokines were observed in this cohort of COVID-19 patients admitted to the intensive care unit, suggesting that a cytokine storm was associated with COVID-19 severity. Here, CSF3 is linked to COVID-19.