Failure of HHV-6 to inhibit the production of TNF-α, RANTES, and MIP-1β from activated Mϕs. Culture supernatants of Mϕs pre-exposed to HHV-6A, either unstimulated or stimulated with IFN-γ and LPS, were tested by ELISA. Mean results (± SD) from 4 donors are presented. (A) TNF-α production. (B) RANTES production. (C) MIP-1β production.