What should you know about flu shot for pregnant women?

Pregnancy changes the heart, lungs, and immune system, which can affect how influenza illness is managed. An inactivated flu vaccine is designed to train immune recognition without causing influenza. Your maternity or primary-care clinician will consider your stage of pregnancy, allergies, previous vaccine reactions, current illness, and local recommendations. Vaccination also supports planning for the newborn period, when very young babies have limited vaccine options.

Tell the vaccinator that you are pregnant, share your maternity record and medicine list, and mention fever, severe allergy, or a previous reaction. After the injection, rest if needed, drink fluids, and expect possible arm soreness, headache, tiredness, or a mild temperature. Ask before taking any medicine for fever or pain so the product and dose fit pregnancy and your other conditions. Continue usual prenatal care.

Contact your maternity team promptly for a persistent or high fever, worsening breathing symptoms, inability to keep fluids down, reduced fetal movement, or concerns about contractions. Seek emergency help for breathing difficulty, facial or throat swelling, collapse, severe chest pain, confusion, or a widespread allergic reaction. These symptoms need assessment even if they begin after vaccination.

Ask which influenza vaccine is recommended in your setting, when it should be given, and how to manage fever or discomfort in pregnancy. You can also ask how vaccination protects household members and what symptoms of influenza should lead to same-day treatment advice.