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Electron microscopy of Vero cells infected with F-BAC gB−/gD−. Vero cells were infected with F-BAC gB−/gD− for 24 to 28 h and then fixed, stained, and sectioned for electron microscopic examination. Arrows point to partially enveloped particles. Asterisks are adjacent to morphologically aberrant enveloped virus particles with denser tegument and misshapen tegument and envelopes.
