FIG 9.

Comparison of preimmune ferret (Sing/86 primed) versus human HAI against a panel of H1N1 viruses. The HAI activity in sera collected from humans 21 days postvaccination with CA/09 split-inactivated vaccine against a panel of 15 H1N1 influenza viruses. People between the ages of 18 to 34 years of age (red line) and 65 to 85 years of age (gold line) were compared to the HAI active from the sera of ferrets that were preimmune to the 1986 virus and then vaccinated with CA/09 VLP vaccine (blue line).