Table 2.

 Serum HI antibody responses against A/California/07/09 elicited by HAC1 in mice

	GMT*				Seropositive rate (%)**
	Pre‐immune	Post‐primary	10 days post‐boost	21 days post‐boost
PBS/Quil A	10 ± 0	10 ± 0	10 ± 0	10 ± 0	0/0/0
HAC1
30 μg/Quil A	10 ± 0	17·3 ± 3·7	987·6 ± 269·8	1810·2 ± 347·3	0/100/100
15 μg/Quil A	10 ± 0	12·0 ± 1·7	1220·1 ± 363·9	1810·2 ± 373·3	0/100/100
5 μg/Quil A	10 ± 0	10·7 ± 0·8	712·2 ± 308·9	806·3 ± 429·5	0/100/100
30 μg/Alhydrogel	10 ± 0	10 ± 0	232·8 ± 139·2	718·4 ± 350·5	0/83·3/100

HI, hemagglutination inhibition; PBS, phosphate‐buffered saline.

^*GMT, geometric mean titer of HI antibodies ± SE.

^**Post‐primary/10 days post‐boost/21 days post‐boost.