We usually think of superantigens (SAg) as dangerous toxins that may cause
toxic shock syndrome and death (Marrack and Kappier, 1990). Now, based on t
wo papers in this issue of Immunity, it seems that we all have SAg genes wi
thin us, lying dormant and waiting to be activated under special circumstan
ces (Sutkowski et al., 2001; Stauffer et al., 2001).