GPX4 and viral infectious disease: Moreover, Na2S4 significantly inhibited the level of cellular lipid peroxidation (p < 0.01, Figure 5B; Figure S31I, Supporting Information), restored the depletion of GSH and GPX4 during viral infection (Figure 5C,D; Figure S31J, Supporting Information), and lowered intracellular lipid ROS and Fe2+ levels (Figures S24A,B and S31N,O, Supporting Information).