What should you know about hepatitis A vaccine in pregnancy?

Pregnancy is a reason to discuss vaccination with a qualified clinician rather than make a decision from a general age-based rule. They will consider travel, a known exposure, work or household risk, previous doses, allergies, immune health and the stage of pregnancy. The potential harm from hepatitis A infection is also part of that conversation.

The vaccine is intended to prevent infection; it does not treat hepatitis A that has already begun. Nausea and loss of appetite can occur in pregnancy for many reasons, while dark urine, yellowing or feeling generally unwell may need a separate medical review.

Tell the maternity team or vaccination clinician that you are pregnant, trying to conceive or recently gave birth. Bring your vaccine record and explain travel dates, possible contact with hepatitis A, allergies and medicines. Do not postpone urgent advice after an exposure while trying to decide alone.

If symptoms suggest liver illness, the clinician may examine you and consider a liver function test or other tests. For general prevention information, see Hepatitis A Vaccination.

Seek prompt medical advice for yellow skin or eyes, dark urine, persistent vomiting, worsening abdominal pain, dehydration or a clear deterioration in your general condition. Emergency help is needed for breathing difficulty, facial or throat swelling, fainting or collapse after vaccination. Pregnancy does not make these warning signs safe to watch at home.

Ask how your exposure or travel plans affect the decision, whether previous doses change the plan, and what symptoms should lead to liver testing. Also ask which clinician will coordinate vaccination advice with your pregnancy care.