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Plaque sizes of PR8/H5N1 6:2 reassortant viruses. Plaque sizes of viruses containing mHA from either VN1194 or VN1203, NA from either H5N1 viruses (VN1194, VN1203, HK213, or VN1203Fill) or H1N1 viruses (PR8, Kanagawa, or WSN), and the remaining genes, which were from PR8(UW), were determined. The plaque size of NIBRG-14 is also shown. The data are reported as mean plaque diameters with standard deviations for >15 plaques with each virus.
