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Table 2 Key substitutions of A(H1N1)pdm09 virus in this study

From: Phylogenetic analysis of HA and NA genes of influenza A viruses in immunosuppressed inpatients in Beijing during the 2018–2020 influenza seasons

HA

Number of substitutions

NA

Number of substitutions

immunosuppressed

immunocompetent

 

immunosuppressed

immunocompetent

S127L

0

2

I99V

1

0

T137A

2

0

N222K

1

0

N146D

9

1

V267A

0

2

K147N

1

0

H275Y

1

0

A158E

1

0

G298A

1

0

N173K

1

0

S340F

1

0

V190I

0

1

N341D

0

1

S202I

8

1

I389K

8

0

K226M

1

0

V394I

1

0

M274I

1

0

S400T

0

2

N277D

8

1

T452I

8

1

   

I467V

0

2