The researchers demonstrated cell death only when both TNF-α and IFN-λ were applied as a treatment, and not in any other combination of cytokines, individually or in combinations that did not include TNF-α and IFN-λ; furthermore, in their analysis of data from Silvin et al. (2020), they observed that while TNF-α production peaked in patients with moderate disease, IFN-λ only peaks in patients with severe COVID-19. This evidence concerns the gene TNF and COVID-19.