  Using a Hagedorn resonance gas picture and quark-hadron duality we estimate
the dilepton emission rate in the vicinity of the QCD deconfinement phase
transition. The result is then used to calculate a dilepton spectrum in
ultrarelativistic heavy ion collisions. We show that multibody contributions
taken into account in the Hagedorn resonance gas approach provide an
enhancement of the production rate of massive dileptons as compared to the
previously considered sources.
