When compared to that of SARS patients, interleukin 1β (IL-­1β), interferon γ (IFN­γ), interferon-inducible (IP-10), and monocyte chemoattractant protein 1 (MCP­1), IL-­4 and IL-­10 levels increased significantly in the blood of patients with COVID-­19. The gene discussed is CCL2; the disease is COVID-19.