TNF and COVID-19: According to a recent study, both innate and adaptive immune responses are activated in COVID-19 patients and the overproduction of cytokines like IL-6 and TNF-α is likely to be involved in cytokine storm syndrome (CSS).67 Figuring out the specific immune cell subsets which these cytokines belong to could benefit our understanding about the pathology of severe COVID-19 patients and design of novel therapies targeting this disease.