Table 3 The validation dataset.

From: Predicting Antigenicity of Influenza A Viruses Using biophysical ideas

Period

Year

Event

Type

# of sequences

Viral pairs

II

1921–1976

Seasonal Flu 1

EPD

31

65

III

1977–1980

Russian Flu1 977

PDM

35

139

IV

1981–2008

Seasonal Flu 2

EPD

59

332

V

2009–21011

Swine 2009

PDM

30

90

VI

2012–2106

Seasonal Flu 3

EPD

13

16