http://www.journalofclinicalvirology.com/article/S1386-6532%2809%2900194-2/abstract Conclusion These results imply that HHV-6A, either in latent form or during acute infection, directly transactivates HERV-K18. This HERV-K18 induction may be mediated through IFN-α that is produced by the HHV-6A-infected cells. The functional implications of superantigen expression are discussed. Wikipedia on Superantigen: Superantigens (SAgs) are a class of antigens which cause non-specific activation of T-cells resulting in polyclonal T cell activation and massive cytokine release. SAgs can be produced by pathogenic microbes (including viruses , mycoplasma , and bacteria ) [1] as a defense mechanism against the immune system. [2] Compared to a normal antigen -induced T-cell response where .0001-.001% of the body’s T-cells are activated, these SAgs are capable of activating up to 25% of the body’s T-cells. [ citation needed ] Furthermore, Anti- CD3 and Anti- CD28 Antibodi...