Figure 2From: Sucrose density gradient centrifugation and cross-flow filtration methods for the production of arbovirus antigens inactivated by binary ethylenimineBEI inactivation of the JEV and MVEV C6/36 virus stocks and of the ALFV PS-EK virus stock at 37°C. The viral titres (Log10PFU/mL) are shown decreasing with time (hours).Back to article page