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Only infected cells are motile. Wounded monolayers of BS-C-1 cells were infected with virus strain WR at 0.05 PFU/cell. At 24 hpi, cells were fixed and stained with rabbit anti-VV serum as described in Materials and Methods (B and D). Also shown are phase-contrast images (A and C) of matching epifluorescence photographs (B and D). Arrows indicate infected cells within the wound area.
