Table 1. Schedule of immunizations and sample collection.

	Week
	0	1	4	5	8	16	17	20
Immunization	x		x			x
PBMCs sample	x	x	x	x	x	x	x	x
Serum sample	x	x	x	x	x	x	x	x
Cervical & vaginal secretions sample	x		x		x	x		x