A nurse is reviewing a client's rubella titer of 1:8 at her second prenatal visit. Which of the following statements by the nurse is appropriate?

Choice A rationale Administering a rubella immunization during pregnancy is contraindicated because the rubella vaccine is a live attenuated virus vaccine. There is a theoretical risk of viral transmission to the fetus, which could lead to congenital rubella syndrome. Vaccination should occur postpartum to protect future pregnancies. Choice B rationale Breastfeeding is not contraindicated after receiving the rubella vaccine. Although rubella vaccine virus can be excreted in breast milk, it generally does not cause clinical illness in the infant and passive transfer of antibodies may provide some protection to the infant. Choice C rationale A rubella titer of 1: indicates a low level of rubella antibodies, meaning the client is susceptible to rubella infection. A titer of less than 1: or 1: is generally considered non-immune, requiring vaccination to prevent congenital rubella syndrome in future pregnancies. Choice D rationale Repeating a rubella titer in the third trimester is not a standard practice for assessing susceptibility. Once susceptibility is determined, the primary intervention is postpartum vaccination. The initial titer result accurately reflects immune status and further testing during pregnancy is unnecessary.