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Scanning electron microscopy of cells infected with VV. HeLa cells were left uninfected (UN) or were infected at a multiplicity of 10 with WT VV (strain WR) or vA33Δ. After 17 h, the cells were fixed with glutaraldehyde and the samples were coated with gold-palladium alloy and viewed with an Amray 1820D microscope.
