Avian H7N9 HA

Avian H7N7 HA

With NA stalk deletion

No NA stalk deletion

With NA stalk deletion

No NA stalk deletion

Average IS at F(0.285)

7

7.8

8

7.9

Average IS at F(0.326)

6.4

6.5

7.95

7.76

Difference of average IS

0.6

1.3

0.05

0.14