Table 1. Frequency of gender between groups in study including individuals with no history of Anthrax, recent Anthrax infection, or one of three different vaccines.

		Gender		Total
		Male	Female
Immunological stimuli	None	7	6	13
	Natural infection	24	4	28
	AVA	9	2	11
	LAAV	5	11	16
	AVP	14	0	14
Total		59	23	82

Statistical investigation demonstrated by Pearson’s Chi squared test that the distribution of males and females was not consistent across participant groups (P < 0.001).