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Table 2 Viral titers of H7N9 CVVs after serial passaging in Vero cells, MDCK cells, and chicken embryonic eggs

From: Development of high-growth influenza H7N9 prepandemic candidate vaccine viruses in suspension MDCK cells

CVVs

HA titer (HAU/50 μL) at each passagea

V1

V1aM1

V1aM2

V1aM3

V1aM3E1

V1sM1

V1sM2

V1sM3

NHRI-RG3

4

64

64

256

2048

512

512

1024

NHRI-RG4

8

64

64

256

2048

512

512

2048

NHRI-RG5

64

256

256

256

2048

2048

2048

2048

NHRI-RG6

64

128

256

256

2048

2048

2048

2048

  1. Note: aPassage history: V Vero cells, aM adherent MDCK cells, E eggs, sM suspension MDCK cells. The number indicates the passage number in the indicated cells