What should you know about mRNA vaccine pregnancy?

During pregnancy, decisions weigh the possible effects of an infection against the benefits and possible reactions of vaccination. An mRNA vaccine uses a temporary message to help the immune system recognise a target; the message is not incorporated into DNA. The right recommendation can depend on the disease being prevented, the product authorised locally, pregnancy stage, previous doses, allergies, and conditions such as asthma or immune problems. A pregnancy test is not a substitute for a clinical discussion, and an accidental dose before pregnancy is recognised should be reported without panic.

Tell your obstetric clinician or vaccination provider that you are pregnant, trying to conceive, or recently gave birth. Share your expected delivery date, prior vaccine record, allergies, medicines, and relevant medical conditions. Ask whether vaccination should be arranged now or at another time, and how to manage fever or arm discomfort if it occurs. Keep the product information and vaccination date. If you are exposed to the infection the vaccine is meant to prevent, seek advice promptly because pregnancy can affect preventive and treatment choices.

After vaccination, obtain emergency help for trouble breathing, swelling of the face or throat, fainting, or widespread hives. Contact your maternity team urgently for severe abdominal pain, vaginal bleeding, severe headache with vision changes, chest pain, or marked shortness of breath. A mild sore arm or tiredness may occur, but worsening or severe symptoms should be assessed rather than attributed automatically to pregnancy or vaccination.

Which vaccine is being offered and what infection does it prevent? How does my pregnancy stage affect timing? What should I do if I develop fever? Is there a reason my allergy or medical history changes the recommendation?