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A. Cells were infected with FusOn-H2 at 5 pfu/cell and micrographs were taken 24 h after infection. Shown is one typical field from each of the cells infected with the virus. Original magnification: 20X. B. Cells were infected with FusOn-H2 at 1 pfu/cell for 1 h. Then cells were harvested at the indicated time and the virus titer was determined by plaque assay of cell lysates on Vero cells.
