Figure 4. Immune protection against influenza viruses of homologous, heterologous, and heterosubtypic NA.
A, B. Bodyweight monitoring and survival rate post homologous NA virus challenge. Challenge dose: A. 5×LD50 rViet (H5N1); B. 5×LD50 Aichi (H3N2). C, D. Bodyweight monitoring and survival rate post heterologous and heterosubtypic NA virus challenge. Challenge dose: C.3×LD50 PR8 (H1N1). D. 3×LD50 Shanghai (H7N9). (*p<0.05, ns, no significance; n=5 for A-B; n=4 for C-D).