GPX4 and COVID-19: We observed that in addition to GPX4, suppressors of ferroptosis, such as Solute Carrier Family 7 Member 11 (SLC7A11, also known as Calcium Channel Blocker Resistance Protein, CCBR1, and Cystine/Glutamate Transporter, a subunit of the Amino Acid Transport System Xc−) [67,68,69,70] and Ferritin heavy chain (FTH1) [71,72,73], were significantly downregulated, whereas the ferroptosis inducer spermidine/spermine N1-acetyltransferase 1 (SAT1) [74,75,76] was upregulated, in HUVECs incubated with serum from COVID-19 non-survivors; strikingly, these regulations were all prevented by Fer-1 (Figure 5).