Table 1. List of the 9 strains of influenza A viruses used in the experiments. Abbreviations, subtypes, sialic acid receptor binding preferences and species of origin are shown.

Strain	Abbreviation	Subtype	Binding preference	Origin	Reference
A/WSN/33	WSN	H1N1	α2,3, α2,6	Human	CFG primscreen_2664, 2933, 3720, 5336 [11,34,35]
A/Duck/Bavaria/1/1977	DK/Bav	H1N1	α2,3	Duck	[4]
A/Puerto Rico/8/1934	PR8	H1N1	α2,3, α2,6	Human	CFG primscreen_1367, 2055
A/California/04/2009	Cal04	H1N1	α2,6	Human	CFG primscreen_2777, 3103, 3104, 3128
A/Hong Kong/415742/2009	HK09	H1N1	α2,6	Human	[4]
A/Swine/Arkansas/2976/2002	Ark02	H1N2	α2,3, α2,6	Swine	[4]
A/Swine/Hong Kong/4167/1999	4167	H1N1	α2,6	Swine	[4]
A/Oklahoma/309/2006	OK309	H3N2	α2,3, α2,6	Human	[4,6]
A/Oklahoma/323/2003	OK323	H3N2	α2,6	Human	[4,6]