Which statement about vaccines during pregnancy is accurate?

Which statement about vaccines during pregnancy is accurate?

• A. Inactivated influenza vaccine during any trimester
• B. Tdap vaccine during the third trimester (27–36 weeks) only
• C. Inactivated influenza vaccine during any trimester and Tdap during the third trimester (27–36 weeks)
• D. Live vaccines are recommended during pregnancy

Answer: (B)

Vaccination during pregnancy aims to protect both mother and baby, and timing is crucial for certain vaccines to maximize the baby’s protection after birth. The key point here is that administering Tdap during the late second to third trimester—ideally between 27 and 36 weeks of gestation—provides the best chance for the mother’s antibodies to cross the placenta and shield the newborn from pertussis during the first months of life. This timing is chosen specifically to optimize neonatal protection, since pertussis can be severe in young infants. Live vaccines, on the other hand, are not given during pregnancy due to potential risks to the fetus. The inactivated influenza vaccine is safe and recommended for pregnant people and can be given in any trimester, which is an important supportive detail but the standout concept in this option is the timing of Tdap. So, the statement highlighting Tdap during the third-trimester window best captures the practical, evidence-based timing that most directly impacts newborn protection.

Vaccination during pregnancy aims to protect both mother and baby, and timing is crucial for certain vaccines to maximize the baby’s protection after birth. The key point here is that administering Tdap during the late second to third trimester—ideally between 27 and 36 weeks of gestation—provides the best chance for the mother’s antibodies to cross the placenta and shield the newborn from pertussis during the first months of life. This timing is chosen specifically to optimize neonatal protection, since pertussis can be severe in young infants.

Live vaccines, on the other hand, are not given during pregnancy due to potential risks to the fetus. The inactivated influenza vaccine is safe and recommended for pregnant people and can be given in any trimester, which is an important supportive detail but the standout concept in this option is the timing of Tdap.

So, the statement highlighting Tdap during the third-trimester window best captures the practical, evidence-based timing that most directly impacts newborn protection.