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Growth kinetics of rA2-P172 and rA2-P176 in Vero and HEp-2 cells. Vero or HEp-2 cells were infected with virus at an MOI of 1.0 or 0.01 PFU/cell and incubated at 33 or 38°C. Aliquots of culture supernatants (200 μl) were harvested at 24-h intervals for 5 days, and the virus titers were determined by plaque assay on Vero cells. Each virus titer is an average of two experiments.
