- For the 30 days prior to enrollment through 30 days following receipt of 2010-2011 inactivated trivalent influenza vaccine (TIV) in the study must fulfill one of the following: (i) she is not able to bear children because she has been surgically sterilized (hysterectomy) or is at least 1 year status post tubal ligation or 1 year post-menopausal or (ii) she agrees to practice effective methods of contraception including, but not limited to, abstinence, barrier methods (such as a condom or diaphragm) used with a spermicide, birth control pills, patches or hormonal shots or hormonal implants, NuvaRing and IUDs (intrauterine devices), or monogamy with vasectomized partner.