Table 1.

Subject demographics

Characteristic	Group A (vaccines alone on day 1) (n = 20)	Group B (vaccines 2 weeks before abatacept) (n = 20)	Group C (vaccines 2 weeks after abatacept) (n = 20)	Group D (vaccines 8 weeks after abatacept) (n = 20)
Age (years)
Mean	34	34	34	36
Standard deviation	12	13	11	13
Range	18–55	18–56	19–56	20–56
Gender (n (%))
Male	10 (50)	8 (40)	10 (50)	11 (55)
Female	10 (50)	12 (60)	10 (50)	9 (45)
Race (n (%))
White	15 (75)	12 (60)	14 (70)	11 (55)
Black	5 (25)	8 (40)	6 (30)	8 (40)
Other	0	0	0	1 (5)