1. Utilizing adequate method of birth control and agree to continue using this method for at least 1 month after enrollment. Adequate methods of birth control may include hormonal (oral, transdermal, or injectable) or double barrier methods (eg condom with spermicide, vaginal combined ring) or intra-uterine device. If using hormonal method or intra-uterine device, usage should be stable for 1 month prior to vaccination and should continue for 1 month post vaccination.