A nurse is caring for a client in the first trimester of pregnancy and discovers that the client lacks immunity to rubella based on her blood work. When is the recommended time for administering rubella immunization?

A. During the next attempt to get pregnant This is incorrect because waiting until the next pregnancy increases the risk of congenital rubella syndrome in future pregnancies. The vaccine should be given immediately postpartum to provide immunity. B. Immediately after delivery This is correct because the rubella vaccine (MMR) is a live vaccine and is contraindicated during pregnancy due to teratogenic effects. It should be given postpartum before hospital discharge to prevent future rubella infections. C. During the third trimester of pregnancy This is incorrect because live vaccines are contraindicated in pregnancy due to the risk of fetal infection. D. During the first trimester of pregnancy This is incorrect because administering a live vaccine early in pregnancy is dangerous and could cause fetal harm or congenital anomalies.