Table 1.

Baseline characteristics of the vaccine groups and volunteers.

Phase	Group	Gender n	Ethnic group n	Age range
IIa	NAIVE	F = 7	Mestizo = 11	20–43
		M = 4
	CONTROL	F = 3	Mestizo = 6	21–42
		M = 3
IIb	SEMI IMMUNE	F = 6	Mestizo = 8	20–44
		M = 6	Afro-Col = 3
			Indigenous = 1
	CONTROL	F = 4	Mestizo = 5	19–28
		M = 2	Indigenous = 1