Cross-protection against European swine influenza viruses in the context of infection immunity against the 2009 pandemic H1N1 virus: studies in the pig model of influenza

Table 2 Percent identity of the amino acid sequences of viral hemagglutinin (HA1) and neuraminidase (NA) segments

Virus	A/California/04/09		Sw/Gent/28/10		Sw/Côtes d’Armor/0046/08		Sw/Gent/26/12		Sw/Gent/172/08
Virus	HA1	NA	HA1	NA	HA1	NA	HA1	NA	HA1	NA
A/California/04/09 (pH1N1)	100	100
Sw/Gent/28/10 (H1N1)	73	91	100	100
Sw/Côtes d’Armor/0046/08 (rH1N1)	72	91	70	97	100	100
Sw/Gent/26/12 (H1N2)	71	41	69	40	90	40	100	100
Sw/Gent/172/08 (H3N2)	34	42	35	40	32	39	33	84	100	100

ISSN: 1297-9716