Pregnancy and travel vaccines — the general principles
Travel medicine in pregnancy requires balancing two considerations: the risk of travel-related illness to mother and baby vs. the risk of certain vaccines (particularly live-virus vaccines) during pregnancy. The conversation is nuanced — and requires a physician review of your specific trip, trimester, and health.
Vaccines safe in pregnancy (inactivated vaccines)
Inactivated vaccines are generally safe in pregnancy:
- Hepatitis A (Havrix, Avaxim): Safe. Recommended if travel risk is significant.
- Typhoid injectable (Typhim Vi): Safe. Note: oral Vivotif is a live vaccine — use injectable instead.
- Hepatitis B / Twinrix: Safe in pregnancy if clearly indicated.
- Malaria pills — Malarone (atovaquone-proguanil): Generally considered safe in pregnancy based on available data. Doxycycline is contraindicated. Discuss with physician.
Vaccines to AVOID during pregnancy (live vaccines)
- Yellow Fever (Stamaril): Live virus — not routinely recommended in pregnancy. If travel to an endemic country is unavoidable, a careful risk/benefit discussion with our physician is required. A medical exemption letter is often the practical solution.
- Oral Typhoid (Vivotif): Live vaccine — contraindicated in pregnancy. Use injectable Typhim Vi instead.
- MMR, Varicella: Live vaccines contraindicated in pregnancy (routine Canadian vaccines — discussed with your OB).
Zika — the most important consideration
Zika virus is the most significant travel health risk specifically for pregnant travellers. Zika infection during pregnancy can cause severe fetal brain abnormalities (microcephaly, brain malformations). Zika is present in Mexico, Central America, the Caribbean, South America, and parts of Southeast Asia.
PHAC recommendation: Pregnant travellers should avoid travel to Zika-endemic destinations if possible. If travel is unavoidable, meticulous mosquito prevention (30% DEET, long sleeves, repellent-treated clothing) is essential — no vaccine exists for Zika.
Destinations with Zika risk: Mexico, Dominican Republic, Cuba, Jamaica, Brazil, Colombia, Peru, Thailand, Vietnam, Philippines, Indonesia.
A note on the first trimester
Travel in the first trimester (0–13 weeks) carries higher miscarriage risk unrelated to vaccines — any early-pregnancy illness or complication while abroad complicates management. The second trimester (14–27 weeks) is generally the safest period for international travel.
Book your pregnancy pre-travel consultation
Our ISTM CTH® physicians are experienced in pregnancy travel medicine. We review your trimester, destination, vaccine safety, and Zika risk in detail. Virtual consultations from Mississauga, Ottawa, Hamilton, and all of Ontario.
Sources: PHAC — Pregnancy and Travel | CDC — Pregnant Travellers
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