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Immunofluorescence photomicroscopy of CL ISUVDL13b cells infected (A, C) and not infected (B) with Virus X. The cells were fixed at approximately 48 h post inoculation and stained with an anti-BVDV bovine polyclonal serum. Panel A and C are presented at 100× magnification, whereas panel C is presented at 200× magnification.
