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Bioresources and Bioprocessing
Fig. 6 | Bioresources and Bioprocessing

Fig. 6

From: Highly efficient production of an influenza H9N2 vaccine using MDCK suspension cells

Fig. 6

Immunogenicity of the MDCK cell-derived H9N2 vaccines compared to egg-derived vaccines. The inactivated MDCK cell-derived H9N2 vaccines prepared by the virus harvested at 48 hpi or 72 hpi and inactivated egg-derived H9N2 vaccines were injected to 3-week-old SPF chickens. HI activity of chicken serum against H9N2 vaccines collected on day 14 (light gray column), day 21 (dark gray column), and day 28 (black column) was determined

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