Virus production of ncp BVDV2a-1373 strain of BVDV by intermediate stages of cells differentiating from monocyte to Mo-DC. Cells in the intermediate stages of differentiation were harvested at 48, 72, 96, and 120 hours. Cells at each intermediate stage of differentiation were infected with ncp BVDV2a 1373 strain of BVDV with a 6 MOI. The cells were collected at 24 and 48 hours post-infection and analyzed for viral titer. The experiment was repeated three times and mean virus titer at each time point.