Comparing four methods in predicting antigenic variants.

Five accuracies “Pred1”, “Pred2”, “Pred3”, “Pred4” and “Pred5” were used to show prediction accuracies for 1, 2, 3, 4 and 5 seasons. “Pred1” predicted the pairwise distances of viruses in each pair of consecutive years k and k−1 for using viruses in [1968, k−1] as training data. “Pred2” predicted the distances between viruses in year k and k−1, and between viruses in year k−2 and those in years k and k−1 using viruses in [1968, k−2] as training data. Similar definitions hold for “Pred3”, “Pred4”, and “Pred5”.Comparing four methods in predicting antigenic variants.