Table 2.

Nucleotide (amino acid) homology comparison of HA1 and NA gene among recent A(H1N1) variants and A/California/07/2009 vaccine strain.

	A/California/07/2009		A/Ontario/N163578/2012		A/Missouri/12/2012		A/Wisconsin/28/2011
	HA1	NA	HA1	NA	HA1	NA	HA1	NA
A/California/07/2009			92.7 (90.8)	79.6 (83.9)	92.9 (90.8)	79.5 (83.9)	92.1 (89.9)	79.4 (82.8)
A/Ontario/N163578/2012	92.7 (90.8)	79.6 (83.9)			99.7 (100)	99.4 (99.3)	97.1 (97.2)	96.8 (95.6)
A/Missouri/12/2012	92.9 (90.8)	79.5 (83.9)	99.7 (100)	99.4 (99.3)			97.2 (97.2)	97.3 (96.3)
A/Wisconsin/28/2011	92.1 (89.9)	79.4 (82.8)	97.1 (97.2)	96.8 (95.6)	97.2 (97.2)	97.3 (96.3)