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One-step virus growth in metabolically active and quiescent HFF. Confluent 6-well plates of active (open symbols) and quiescent (closed symbols) HFF were infected with WR and recombinant viruses at a multiplicity of 5. The infected cells were harvested at the indicated times post infection and virus titers were determined on BS-C-1 cells. Average titers are shown; bars representing standard error of the mean could not be printed because of their very close spacing.
