Table 5.

Changes in antibody levels depending on time since last vaccine dose

Last vaccination (quarter)	Percentage of count	Mean	Median	SD	IgG concentration (BAU/ml)
1	9.09	4378.70	4136.00	2263.21
2	2.71	2900.47	2203.40	2195.76
3	14.28	2003.37	1555.50	1629.50
4	45.38	2155.77	1654.20	1761.41
5	16.13	2150.34	1550.40	1823.10
6	5.44	1287.11	901.80	1238.53
7	6.03	1821.48	1496.90	1412.95
8	0.94	2017.37	1571.60	1642.94
					0 2000 4000 6000 8000