Table 2. Performance on the antigenic data of avian influenza H9N2 viruses for the regional band-based models built on the antigenic data of H1N1, H3N2, H5N1 and in combination.

Subtypes for training models	Accuracy	Sensitivity	Specificity
Combination of H1N1, H3N2 and H5N1	0.77	0.95	0.26
H1N1	0.80	0.94	0.39
H3N2	0.75	0.93	0.26
H5N1	0.79	0.93	0.39