Three Types of Broadly Reacting Antibodies against Influenza B Viruses Induced by Vaccination with Seasonal Influenza Viruses

Figure 10

Neutralizing activity. The virus-neutralizing activity of 100 or 250 μg/ml Fab-pp Ab against B/Massachusetts/2/2012 (MAS) and B/Brisbane/60/2008 (BRI) viruses was examined by the focus reduction test. The focus reduction rate is shown as a percentage. nd indicates not done.