Figure 2
From: "Boom" and "Bust" cycles in virus growth suggest multiple selective forces in influenza a evolution
Successful growth in the presence of IgY does not correlate with lack of susceptibility to neutralization. Selected passages were tested for sensitivity to hemagglutination inhibition (HAI) by immune IgY (A), and neutralization of infection compared to infection in the absence of IgY (B). Note that the y-axis in panel B is logarithmic (nd: no data available).