FIG. 3.
Growth characteristics of recombinant influenza viruses. MDCK cells were infected at an MOI of 0.001 with rWSN (⋄), WSN-BNA (▴), WSN-BNA/A65 (▵), WSN-BNA/ACT (▪), and WSN-BNA/ACT-ATM (□) viruses (A) or with wild-type WSN (♦) and WSN-BHA/ACT-ATM (P6 [▪] and H545Y [□]) viruses (B). Plaque assays were performed on MDCK cells. h p.i., hours postinfection.