In a previous study, it was discovered that the plasma levels of interleukin (IL)-10, IL-2, IL-7, tumour necrosis factor-α (TNF-α), interferon-γ–inducible protein 10 (IP-10), monocyte chemoattractant protein 1, and macrophage inflammatory protein 1A were higher in COVID-19 patients who were in the intensive care unit (ICU) as compared to those who were not [4]. Here, TNF is linked to COVID-19.