Figure 2From: Virulence of H5N1 virus in mice attenuates after in vitro serial passagesGrowth curves of 1194-LP and 1194-SP. Cells were inoculated at a 0.01 MOI (multiplicity of infection). The plaque titers of the supertant of MDCK (A) or A549 (B) cells infected with 1194-LP (â—Š) or 1194-SP (*) were determined at appropriate time points on MDCK cells. Each curve is the average of three independent experiments.Back to article page