3.1.2.8 Pregnant women are excluded from this study because the vaccines used in the study may have the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with the vaccine, breastfeeding should be discontinued if the mother is treated with vaccines. These potential risks may also apply to other agents used in this study. Patients must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while her partner is participating in this study, she should inform her treating physician immediately