. 2010 Dec 9;5(12):e14270. doi: 10.1371/journal.pone.0014270

Table 4. Geometric Mean HI Titer against the Seasonal and the 2009 A/H1N1 Influenza Virus in Two Groups of Mice with Different Vaccination Procedures^#.

	Day 0		Day 21		Day 35
GMT (95% CI)	Seasonal	2009 A/H1N1	Seasonal	2009 A/H1N1	Seasonal	2009 A/H1N1
Group A (N = 10)	5 (5-5)	5 (5-5)	5 (5-5)	5 (5-5)	5 (5-5)	149 (104-215)
Group B (N = 10)	5 (5-5)	5 (5-5)	160 (115-223)^**	5 (5-5)	160 (115-223)^**	197 (155-250)

Group A: mice immunized with PBS (control) on day 0 and the 2009 A/H1N1 influenza vaccine on day 21; Group B: mice immunized with the 2008-09 trivalent seasonal influenza vaccine on day 0 and the 2009 A/H1N1 influenza vaccine on day 21.

Seasonal: geometric mean HI titer against the 2008-09 trivalent seasonal influenza vaccine; 2009 A/H1N1: geometric mean HI titer against the 2009 A/H1N1 pandemic influenza vaccine.

**(p<0.001) represents the statistical differences between Group A and Group B (two-way Student's t-test).

Table 4. Geometric Mean HI Titer against the Seasonal and the 2009 A/H1N1 Influenza Virus in Two Groups of Mice with Different Vaccination Procedures#.

Table 4. Geometric Mean HI Titer against the Seasonal and the 2009 A/H1N1 Influenza Virus in Two Groups of Mice with Different Vaccination Procedures^#.