Table 2.

Time Course of Seroconversion and Seroprotection Rates Achieved With Vaccination

Study Day	Seroconversion Rate (%)			Seroprotection Rate (%)
	3AV	1AV	Р value	3AV	1AV	Р value
1	0	0		0	0
28	93.88	76.60	<.05	61.22	51.06	NS
90	100.00	95.75	NS	95.92	87.23	NS
180	100.00	95.75	NS	100.00	89.36	NS
210	100.00	97.87	NS	100.00	97.87	NS

P > .05.

Abbreviations: 1AV, single antigen vaccine; 3AV, 3-antigen vaccine, NS, not significant.